Optical Fiber Patents (Class 359/341.1)
  • Patent number: 10340655
    Abstract: The invention relates to an optical waveguide (3) as a laser medium or as a gain medium for high-power operation, wherein the optical waveguide (3) is an optical fiber, the light-guiding core of which, at least in sections, is doped with rare earth ions. It is an object of the invention to provide an optical waveguide as a laser or a gain medium, and a laser/amplifier combination realized therewith, in which the output signal of the laser or gain medium is better stabilized. The invention achieves this object by virtue of the maximum small signal gain of the optical waveguide (1) being up to 60 dB, preferably up to 50 dB, more preferably up to 40 dB, even more preferably up to 30 dB, on account of the concentration of the rare earth ions and/or the distribution thereof in the light-guiding core. Moreover, the invention relates to the use of such an optical waveguide as an amplifier fiber (3) in a laser/amplifier combination.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: July 2, 2019
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., FRIEDRICH-SCHILLER-UNIVERSITÄT
    Inventors: Hans Jurgen Otto, Cesar Jauregui Misas, Jens Limpert, Andreas Tunnermann
  • Patent number: 10333615
    Abstract: An optoelectronic module management system includes a network connection communicatively coupled to an optoelectronic module, a memory, and a processing device operatively coupled to the memory. The processing device is configured to perform or control performance of operations that include identify the optoelectronic module via a management network. The optoelectronic module includes a management communication element that is communicatively coupled to the management network and an optical communication element that is communicatively coupled to a fiber optic cable. The operations further include add the optoelectronic module to a list of monitored devices, monitor the optoelectronic module, provide a service to the optoelectronic module in response to the monitoring, and generate a report of the service provided to the optoelectronic module.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: June 25, 2019
    Assignee: FINISAR CORPORATION
    Inventors: Giuliano Coli, Rafik Ward
  • Patent number: 10333269
    Abstract: A laser system includes a master oscillator, which emits a train of optical seed pulses with variable intervals between the pulses. An optical power amplifier includes an optical gain medium, which receives and amplifies the optical seed pulses from the master oscillator, and a pump, which applies pump radiation to the optical gain medium. A pulse generator applies a control input to the master oscillator, which causes the intervals between the optical seed pulses to vary by at least 50% at a rate of change that is greater than a response frequency of the optical gain medium. A control unit drives the pump responsively to predicted intervals between the optical seed pulses, at a variable pump power selected so that the pulse amplitudes of the output pulses vary by no more than 20% irrespective of the varying intervals between the optical seed pulses.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: June 25, 2019
    Assignee: APPLE INC.
    Inventors: Ido Luft, Andrew J. Sutton, Ronen Akerman
  • Patent number: 10302873
    Abstract: A bridge adapter that includes a first end and a second end. The bridge adapter further including a first ferrule connection on the first end and a second ferrule connection on the second end. The bridge adapter also including an optical path optically connecting the first ferrule connection and the second ferrule connection. Also, a method of connection optical cable having multiple pitches, the method including connecting a first optical cable having a first fiber pitch to a bridge adapter and connection having a second fiber pitch to the bridge adapter. The method further including directing an optical signal through the first optical cable, the bridge adapter, and the second optical cable, wherein the directing includes sending the optical signal through an optical wave bridge in the bridge adapter and having the first fiber pitch on a first end and the second fiber pitch on the second end.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: May 28, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin Leigh, John Norton, Sagi Mathai
  • Patent number: 10281647
    Abstract: The invention relates to an optical waveguide with at least one core region (1) extending along the longitudinal extent of the optical waveguide, and with a first jacket (2) which, viewed in the cross section of the optical waveguide, surrounds the core region (1). The invention further relates to an optical arrangement with such an optical waveguide, and to a method for producing the optical waveguide. The object of the invention is to make available an optical waveguide for high-performance operation, which is improved in relation to the prior art in terms of mode instability. The invention achieves this object by virtue of the fact that the optical waveguide consists of crystalline material at least in the core region (1).
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: May 7, 2019
    Assignees: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Friedrich-Schiller-Universitat Jena
    Inventors: Cesar Jauregui Misas, Andreas Tunnermann, Jens Limpert, Christian Gaida
  • Patent number: 10277000
    Abstract: A novel broadband light source composed of supercontinuum light source and high-power single-wavelength semiconductor laser diodes. It includes an electronics control board, a supercontinuum light source, and a series of single-wavelength semiconductor laser diodes. The frequency of each single-wavelength semiconductor laser diodes is adjusted to integer times or division times of a frequency of the supercontinuum light source by using the electronics control board. Weaknesses of the supercontinuum light source that it is difficult to cover a wavelength less than 400 nm and power density at a wavelength of 400-2400 nm is less than 10 mW/nm are compensated by using the single-wavelength semiconductor lasers.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: April 30, 2019
    Assignee: WUHAN YANGTZE SOTON LASER CO. LTD.
    Inventors: Weijia Yang, Kangkang Chen
  • Patent number: 10239749
    Abstract: An electrical cross-point switch N inputs, each at least 10 Gbps, connected to input transmission lines; M outputs, each at least 10 Gbps, connected to output transmission lines; at least two Radio Frequency (RF) Microelectromechanical systems (MEMS) switches selectively interconnecting each input transmission line and each output transmission line; and control and addressing circuitry configured to selectively control interconnection of each input transmission line and each output transmission line via the at least two RF MEMS switches. The at least two RF MEMS switches can be embedded in each input transmission line and each output transmission line. The input transmission lines and the output transmission lines can each be partially shielded microwave transmission lines.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: March 26, 2019
    Assignee: Ciena Corporation
    Inventors: Michael Y. Frankel, John P. Mateosky
  • Patent number: 10235307
    Abstract: An optical transceiver that shortens an elapsed time for loading data from an external device, and a method of loading data are disclosed. The optical transceiver includes an inner memory, a central processing unit (CPU), and a serial communication line connecting the CPU with the external device. The CPU actively loads data stored in the external device into the inner memory through the serial communication line by operating as a master device in the serial communication line.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: March 19, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiromi Tanaka, Ryutaro Futami
  • Patent number: 10203265
    Abstract: An optical characteristic of a coupled multi-core optical fiber is evaluated without core alignment, one of plural cores thereof being arranged as a center core at the center of a cladding thereof, a total number of spatial modes being a number of the cores or greater, (a fiber length)×(a power coupling coefficient between the cores) being 10 or greater. The coupled multi-core optical fiber is joined to a dummy fiber, having a core at the center of a cladding having the same shape and dimension as those of the coupled multi-core optical fiber, by causing one ends of the fibers to face each other and aligning the fibers with reference to the circumferences of the fibers. Light is launched to the coupled multi-core optical fiber joined to the dummy fiber, and a light measurement unit measures the light passing through the fibers.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: February 12, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Tetsuya Hayashi
  • Patent number: 10135219
    Abstract: A device may include a transient optical amplifier having stored energy associated with a lower boundary and an upper boundary of a dynamic equilibrium, and a target level defining stored energy for amplifying a high energy input pulse to a higher energy output pulse. The device may include a pump to increase the amplifier's stored energy, and a source to pass low energy control pulses or the high energy input pulse to the amplifier. The device may include a controller configured to maintain the amplifier's stored energy in the dynamic equilibrium by requesting low energy control pulses for the amplifier at a high repetition frequency. The controller may wait to receive a trigger. Based on receiving the trigger, the device may stop passing low energy control pulses to the amplifier, and may pass the high energy input pulse to the amplifier when the amplifier's stored energy reaches the target level.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: November 20, 2018
    Assignee: Lumentum Operations LLC
    Inventors: Hubert Ammann, Marco Benetti
  • Patent number: 10101467
    Abstract: This invention relates to a sensor device consisting of long period gratings made of rare-earth doped double clad fiber, which is written by CO2 laser irradiation while the fiber is held static, for gamma dose measurement in the range of 150 Gy-2.5 kGy, extendable to 20 kGy, which measurements are real-time and can be from remote locations. The sensor device has high wavelength dip shift sensitivity of at least 2.8 nm/kGy, and its radiation-induced changes are near permanent. The gratings demonstrate negligible temperature sensitivity and the shifts recorded show negligible annealing at room temperature.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: October 16, 2018
    Assignee: SECRETARY, DEPARTMENT OF ATOMIC ENERGY, GOVERNMENT OF INDIA
    Inventors: Sanjay Kher, Smita Chaubey, Jai Kishore, Srikant M. Oak
  • Patent number: 10036850
    Abstract: This disclosure relates to polarizing optical fibers and polarization maintaining optical fibers, including active and/or passive implementations. An embodiment includes a polarizing (PZ) optical fiber that includes stress applying parts (SAPs) disposed in a first cladding region, the SAPs comprising a material with a thermal expansion coefficient, ?SAP. A core region is at least partially surrounded by cladding features and the SAPs. The core includes glass with a thermal expansion coefficient, ?core. The arrangement of the SAPs satisfies: Rsc=dSAP/Dsc, where Dsc is the SAP center to core center distance, and dSAP is the average SAP diameter, and d?=|?SAP??core|, and where Rsc and d? may be sufficiently large to induce stress birefringence into the core and to provide for polarized output. Active fibers in which a portion of the fiber is doped may be implemented for application in fiber lasers, fiber amplifiers, and/or optical pulse compressors.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: July 31, 2018
    Assignee: IMRA America, Inc.
    Inventors: Shigeru Suzuki, Hugh A. McKay, Martin E. Fermann
  • Patent number: 10033515
    Abstract: Systems and Methods for RF Energy Multiplexers are provided. In one embodiment, a multiplexer comprises: a multiplexer stage that includes: a first three port device coupled to a first port of the multiplexer and a first reflective filter, wherein the first reflective filter has a pass band that passes energy at a first frequency, and reflects energy at at least one of a second frequency outside of the pass band back into the first three port device; and a first filtered-load sub-stage coupled to the first three port device, the sub-stage comprising a second three port device coupled to a second reflective filter and a first absorbing load, where the second reflective filter passes energy at the first frequency to the first absorbing load and reflects energy at the at least one of a second frequency outside of the first pass band back into the second three port device.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: July 24, 2018
    Assignee: Honeywell International Inc.
    Inventor: Adam M. Kroening
  • Patent number: 10014658
    Abstract: Described herein are photonic integrated circuits (PICs) comprising a semiconductor optical amplifier (SOA) to output a signal comprising a plurality of wavelengths, a sensor to detect data associated with a power value of each wavelength of the output signal of the SOA, a filter to filter power values of one or more of the wavelengths of the output signal of the SOA, and control circuitry to control the filter to reduce a difference between a pre-determined power value of each filtered wavelength of the output signal of the SOA and the detected power value of each filtered wavelength of the output signal of the SOA.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: July 3, 2018
    Assignee: Aurrion, Inc.
    Inventors: Erik Johan Norberg, John M. Garcia, Brian Koch, Gregory Alan Fish
  • Patent number: 9971094
    Abstract: An optical module adapted to combine a first and a second light beam into a mixed light beam is provided. The optical module includes a base, an optoelectronic element and an optical dichroic element. The base has an accommodating space. The optoelectronic element is adapted in the accommodating space. The optical dichroic element is adapted on the base. The optical dichroic element includes a transparent element, a first reflector and a second reflector. The transparent element is adapted to let the first light beam and the second light beam pass through. The first and second reflector are disposed on the transparent element. The first reflector is adapted to reflect the first light beam to the second reflector. The second reflector is adapted to reflect the first light beam and let the second light beam pass through. The first and the second reflector are opposite and not parallel to each other on the transparent element, and there is an angle between the first and the second reflector.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: May 15, 2018
    Assignee: ELASER TECHNOLOGIES CO., LTD.
    Inventors: Chu-Liang Cheng, Chi-Hua Wang
  • Patent number: 9967047
    Abstract: A method for transmitting digital data by a primary optical signal between a transmitter terminal and a receiver terminal, involves the following steps: determining a magnitude characterizing optical-wave degradation between the transmitter terminal and the receiver terminal, determining a number of transmission channels by a decreasing function of the magnitude characterizing optical-wave degradation, distributing the digital data over the transmission channels, modulating optical signals of different wavelengths using digital data distributed over the transmission channels, generating the primary optical signal by wavelength multiplexing of the optical signals, and sending a transmission configuration, including at least the number of transmission channels, from the transmitter terminal to the receiver terminal.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: May 8, 2018
    Assignee: THALES
    Inventors: Arnaud Le Kernec, Mathieu Dervin, Michel Sotom
  • Patent number: 9935419
    Abstract: In an optical fiber device having a configuration in which an optical fiber is joined to a side surface of another optical fiber, a joint portion is suppressed from reaching a high temperature. The optical fiber device includes a first fluoride fiber, a second fluoride fiber, and a heat dissipation member. The first fluoride fiber guides light. The second fluoride fiber has a first end on or from which light is incident or output and a second end at which an end surface of the second fluoride fiber is obliquely joined to a side surface of the first fluoride fiber.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: April 3, 2018
    Assignees: MITSUBOSHI DIAMOND INDUSTRIAL CO., LTD., OSAKA UNIVERSITY
    Inventors: Masanao Murakami, Christian Schaefer, Satoshi Hattori, Takahisa Hayashi, Seiji Shimizu, Shigeki Tokita
  • Patent number: 9935708
    Abstract: A coherent optical spectrum analyzer for monitoring a spectrum of a fiber link is provided. The coherent optical spectrum analyzer comprises an input connectable to the fiber link, the input being connected to a first input of a coherent detector having at least two input, the first and a second input, and an output. The coherent optical spectrum analyzer further comprises a local oscillator having an output connected to the second input of the coherent detector, wherein the output of the coherent detector is connected to a first input of a processing unit, the processing unit also being connected to an input of the local oscillator, the processing unit being configured for analyzing information from the coherent detector. The local oscillator comprises a semiconductor laser tuned by temperature to a specific wavelength and swept by changing a bias current, the local oscillator being controlled by the processing unit.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: April 3, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Chantal Vilà, Gregori Azcarate, Robert Pous
  • Patent number: 9927621
    Abstract: A method and apparatus for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination. This invention includes a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength; a beam annularizer that includes a plurality of optical units arranged to receive the beamlets, and configured to convert each beamlet into a respective annular beam that has an annular cross-sectional power profile; a beam-intersection transform element configured to point each respective one of the plurality of annular beams in an angular intersection arrangement toward a first location; and a spectral beam combiner at the first location configured to combine the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: March 27, 2018
    Assignee: Lockheed Martin Corporation
    Inventors: Eric C. Honea, Yongdan Hu
  • Patent number: 9874666
    Abstract: An optical film, a display device including the same, and a method of manufacturing the optical film, the film including a first refractive index layer including a plurality of protrusions; a second refractive index layer covering the plurality of protrusions, the second refractive index layer having a refractive index that is different from a refractive index of the first refractive index layer; and a support layer on the first refractive index layer or the second refractive index layer, wherein a ratio of a height to a width of the protrusion is 0.5 or more.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: January 23, 2018
    Assignees: SAMSUNG DISPLAY CO., LTD., SEKONIX CO., LTD
    Inventors: Duk Jin Lee, Nam Seok Baik, Jang Seok Ma, Jung Hee Son, Gyeong-Im Lee, Jung Chul Seo, Seok Il Yoon, Chan Hee Lee
  • Patent number: 9868631
    Abstract: A Microelectromechanical systems (MEMS)-based N×M cross-point switch, a MEMS-based system, and a method provide MEMS-based cross-point electrical switching for a Layer 0 flow-based switch. The N×M cross-point switch includes N inputs each at least 10 Gbps, M output each at least 10 Gbps, a plurality of Radio Frequency (RF) MEMS switches selectively interconnecting the N inputs to the M outputs; and control and addressing circuitry to selectively control the plurality of RF MEMS switches to switch each of the N inputs to a corresponding output of the M outputs. The systems and methods provide an electrical switching fabric for flow-based switching of wavelengths that can be part of a Reconfigurable Electrical Add/Drop Multiplexer (READM) with similar functionality as a ROADM in the electronic domain.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: January 16, 2018
    Assignee: Ciena Corporation
    Inventors: Michael Y. Frankel, John P. Mateosky
  • Patent number: 9791618
    Abstract: A hollow-core waveguide structure for guiding an electromagnetic signal, comprising: a core material comprising a predetermined refractive index; and a cladding structure disposed about the core material, wherein the cladding structure has a refractive index that is less than unity; wherein the cladding structure comprises an Epsilon-near-zero (ENZ) metamaterial. The core material comprises air or the like. The cladding structure comprises one of substantially planar sheets disposed about the core material and a substantially tubular structure disposed about the core material. Optionally, the ENZ metamaterial comprises a plurality of nanostructures disposed in a host medium. The plurality of nanostructures comprise a transparent conducting oxide. Alternatively, the cladding structure is manufactured via a self-assembly method.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: October 17, 2017
    Assignee: The University of North Carolina at Charlotte
    Inventors: Hossein Alisafaee, Michael Fiddy
  • Patent number: 9784913
    Abstract: Optical waveguide cores having refractive index profiles that vary angularly about a propagation axis of the core can provide single-mode operation with larger core diameters than conventional waveguides. An optical waveguide includes a core that extends along a propagation axis and has a refractive index profile that varies angularly about the propagation axis. The optical waveguide also includes a cladding disposed about the core and extending along the propagation axis. The refractive index profile of the core varies angularly along a length of the propagation axis.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: October 10, 2017
    Assignee: nLIGHT, Inc.
    Inventors: Joona Koponen, Changgeng Ye, Ossi Kimmelma
  • Patent number: 9766070
    Abstract: An interferometric measurement device includes a broad-spectrum spontaneous emission light source; a measurement interferometer, receiving a light signal with input light power and delivering a modulated light signal with output light power, the modulated light signal being modulated at a modulation frequency, depending on a physical parameter to be measured and being proportional to the input light power; an optical radiation detector, receiving the modulated light signal exiting from the measurement interferometer and delivering a modulated electrical signal representative of the output light power; a filtering interferometer, insensitive to the physical parameter to be measured, having a free spectral range ISL and a finesse F selected such that an interval of frequencies, centerd around an optimal frequency foptim equal to (2k+1)ISL/2, k being a natural number, and of width ?f equal to [0.9?(3/2F)]ISL, includes the modulation frequency of the modulated light.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: September 19, 2017
    Assignee: IXBLUE
    Inventors: Joachin Honthaas, Herve Lefevre, Eric Ducloux, Jean-Jacques Bonnefois
  • Patent number: 9764563
    Abstract: Disclosed a laser marking machine, method, equipment and system. The method comprises steps of: the control main board receiving coordinate and gray scale value of the target image pixel dot; calculating output power of the target image pixel dot by using the gray scale value; and controlling the laser device to use corresponding output power according to displacement of the galvanometer, and outputting laser specific to each target image pixel dot. By adjusting the output power of target image pixel dot (marking point), a separate pixel dot may reflect the change of gray scale value, so as to represent the image gray scale value. The coordinate of each pixel dot in the gray scale image may be calculated according to the predetermined resolution, such that, the coordinate of pixel dot is no longer adjusted, ensuring the DPI and the resolution of the gray scale image.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: September 19, 2017
    Assignee: MAXPHOTONICS CORPORATION
    Inventors: Jun Song, Gaofeng He, Xiaobo Hu, Feng Jiang
  • Patent number: 9733424
    Abstract: A multicore fiber according to an embodiment of the present invention includes a plurality of cores and a cladding that encloses the plurality of the cores. The external form of the cladding in a cross section is formed of an arc portion that is formed in an arc shape relative to the center axis of the cladding and a non-arc portion that is pinched between two ends of the arc portion and not formed in an arc shape relative to the center axis of the cladding. The non-arc portion is formed with a pair of projections projecting from two ends of the arc portion on the opposite side of the center axis relative to a straight line connecting the both ends of the arc portion and one or more of recesses pinched between the pair of the projections.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: August 15, 2017
    Assignee: FUJIKURA LTD.
    Inventors: Itaru Ishida, Shoichiro Matsuo
  • Patent number: 9645309
    Abstract: Holey fibers provide optical propagation. In various embodiments, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: May 9, 2017
    Assignee: IMRA America, Inc.
    Inventors: Liang Dong, Donald J. Harter, William Wong
  • Patent number: 9647413
    Abstract: Provided are a high-efficiency parallel-beam laser optical fiber drawing method and optical fiber, the method including the steps of: S1: providing base planes on the side surfaces of both a gain optical fiber preform and a pump optical fiber preform, inwardly processing the base plane of the gain optical fiber preform to make a plurality of ribs protrude, and inwardly providing a plurality of grooves on the base plane of the pump optical fiber preform; S2: embedding the ribs into the grooves, tapering and fixing one end of the combination of the ribs and the grooves to form a parallel-beam laser optical fiber preform; S3: drawing the parallel-beam laser optical fiber preform into parallel-beam laser optical fibers. The process has high repeatability, and the obtained parallel-beam laser achieves peelability of pump optical fibers in a set area, thus facilitating multi-point pump light injection of parallel-beam laser optical fibers.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: May 9, 2017
    Assignee: Fiberhome Telecommunication Technologies Co., Ltd.
    Inventors: Cheng Du, Wei Chen, Shiyu Li, Yili Ke, Qi Mo, Tao Zhang, Wenyong Luo, Kun Du, Rong Dan
  • Patent number: 9620923
    Abstract: A device for laterally coupling pump light into a fiber. A fiber runs in a longitudinal direction, having an optically active medium to be pumped and a lateral wall running approximately in the longitudinal direction, and at least one light coupler, at least some part of which runs parallel to the fiber along the lateral wall. The light coupler is an optical waveguide which is optically coupled to the fiber such that pump light propagating in the optical waveguide can be coupled into the fiber via the lateral wall. The efficiency of the pump light coupling is improved by a plurality of windings of the fiber being located alternately with waveguides on a substrate. The pump light can be coupled into all waveguides simultaneously, for example by a prism.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: April 11, 2017
    Assignee: Rosenberger Hochfrequenztechnik GmbH & Co. KG
    Inventors: Benjamin Weigand, Christian Theobald, Johannes Albert L'huillier, Clemens Wurster
  • Patent number: 9577400
    Abstract: Provided is a frequency shifting optical swept light source system. The system includes a light source that emits light; an amplifier that amplifies the light output from the light source; an optical converter that shifts a frequency of the amplified light and compresses a spectrum of the amplified light; and a controller that controls a current signal applied to the light source such that a repetition rate of the light output from the light source is adjusted, so that an intensity of the amplified light is adjusted, to thereby adjust a position of the compressed spectrum with respect to a predetermined frequency band.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: February 21, 2017
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Hong-sig Kim, Yoon-chan Jeong, Young-chul Kwon, Luis Alonso Vazquez Zuniga, Woo-young Jang
  • Patent number: 9547176
    Abstract: The invention relates to a device for generating laser radiation (3) having a linear intensity distribution (11), comprising a plurality of laser light sources for generating laser radiation (3) and optical means for transforming laser radiation (3) exiting from the laser light sources into laser radiation (14) that has a linear intensity distribution (11) in a working plane (9), wherein the laser light sources are constructed as fundamental mode lasers and the device is designed such that each of the laser beams (3) exiting from the laser light sources does not overlap with itself.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: January 17, 2017
    Assignee: LIMO PATENTVERWALTUNG GMBH & Co. KG
    Inventors: Vitalij Lissotschenko, Paul Alexander Harten
  • Patent number: 9515765
    Abstract: Implementing a laser into a system that uses a remote powered combiner or an aggregating combiner (AC) with one or more in-range contributing combiners may provide power to the downstream contributing combiners (CC). The power may be provided on the same fiber that downstream signals and the upstream signals traverse.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: December 6, 2016
    Assignee: ARRIS Enterprises, Inc.
    Inventors: Venkatesh G. Mutalik, Marcel F. Schemmann
  • Patent number: 9512032
    Abstract: A glass frit includes at least three metal oxides selected from the group of lead oxide, silicon oxide, tellurium oxide, bismuth oxide, zinc oxide, and tungsten oxide, wherein the glass frit exhibits a phase transition peak in the range of about 300° C. to about 600° C. on a cooling curve obtained via an TG-DTA analysis while a mixture of the glass frit and silver powder, obtained by mixing the glass frit with the silver powder in a weight ratio of 1:1, is cooled at a cooling rate of 10° C./min, after heating the mixture to 850° C. at a heating rate of 20° C./min and held there for a wait-time of 10 minutes.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: December 6, 2016
    Assignee: Cheil Industries, Inc.
    Inventors: Young Wook Choi, Eun Kyung Kim, Ju Hee Kim, Young Ki Park, Dae Seop Song, Jae Ho Kim, Sang Hyun Yang
  • Patent number: 9472919
    Abstract: Narrow line width, high power pulses of optical radiation may be generated by the combination of stimulated emission and stimulated Raman scattering within a rare earth doped optical fibre (24b). The signals of a first (11) and second (13) seed laser sources are coupled into the fiber. The radiation of the pulsed first seed laser source (11) is amplified by stimulated emission of the rare earth ions so that the threshold for stimulated Raman scattering into the mode of the second seed laser source 13 is exceeded, and efficient SRS transfers nearly all the power into the mode seeded by the second seed laser source (13).
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: October 18, 2016
    Assignee: V-gen Ltd.
    Inventors: Eitan Emanuel Rowen, Jacob Lasri, Eran Inbar
  • Patent number: 9455783
    Abstract: A pulsed light communication device has a plurality of indicator light emitting diodes emitting diodes emitting at least one of a plurality of wavelengths of colored light to correspond to a designated color assigned to a security level for a network. A continuous uninterrupted modulated pulsed light emitting diode light signal may be generated having a sensitivity threshold detection level exceeding minimal parameters of a photodetector.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: September 27, 2016
    Assignee: Federal Law Enforcement Development Services, Inc.
    Inventors: John C. Pederson, Timothy J. Vogt
  • Patent number: 9448423
    Abstract: The invention discloses a device for selecting pulses comprising an optical waveguide for guiding the optical radiation along an axis; comprising a first electro-optical modulator designed to modulate the optical transparency of the waveguide; comprising a second electro-optical modulator designed to modulate the optical transparency of the waveguide, wherein the first modulator and the second modulator are arranged one after the other on the axis of the waveguide, and further comprising at least one control circuit designed to actuate the first modulator and the second modulator at offset times, and characterized in that a substrate of a semiconductive material is provided, the waveguide and the at least one control circuit are arranged on the substrate.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: September 20, 2016
    Assignee: Forschungsverbund Berlin E.V.
    Inventors: Thomas Hoffmann, Armin Liero, Andreas Klehr, Sven Schwertfeger
  • Patent number: 9379839
    Abstract: An optical transmission device includes: a spectral element configured to disperse an incident light beam in a first direction according to a wavelength of the incident light beam; a mirror array configured by a plurality of mirrors, each mirror having a reflective surface in which a reflection angle is adjustable and to which the incident light beam dispersed in the first direction is incident, the reflective surface being arranged on a plane formed by the first direction and a second direction orthogonal to the first direction; a plurality of ports arranged in the second direction; and a controller configured to adjust the reflection angle, so that a light beam reflected at the reflective surface is outputted to the port according to a region segmented in the second direction in the mirror array, the dispersed incident light beam that has a specified wavelength band being incident to the reflective surface.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: June 28, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Takuma Shoji, Ichiro Nakajima
  • Patent number: 9356416
    Abstract: An HOM-based optical fiber amplifier is selectively doped within its core region to minimize the presence of dopants in those portions of the core where the unwanted lower-order modes (particularly, the fundamental mode) of the signal reside. The reduction (elimination) of the gain medium from these portions of the core minimizes (perhaps to the point of elimination) limits the amount of amplification impressed upon the backward-propagating Stokes wave. This minimization of amplification will, in turn, lead to a reduction in the growth of the Stokes power that is generated by the Brillouin gain, which results in increasing the amount of power present in the desired, forward-propagating HOM amplified optical signal output.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: May 31, 2016
    Assignee: OFS FITEL, LLC
    Inventor: Marc Mermelstein
  • Patent number: 9318290
    Abstract: A complex logic gate comprising digital MEM switches, coupled to a high voltage MEMS buffer, to provide a high voltage depending upon gate and body voltages of the digital MEM switches.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: April 19, 2016
    Assignee: Ciena Corporation
    Inventor: Michael Y. Frankel
  • Patent number: 9306364
    Abstract: An ultra-high power fiber laser system includes a single-piece fiber booster configured with fiber and straight short rod fiber portions which have in common a core configured with a numerical aperture?0.1. The rod fiber portion has a length?a few tens of centimeters and has a frustoconical cross-section expanding from the uniformly configured fiber portion. The core extending along the fiber portion supports a single mode (SM) or very low number of HOMs, whereas the large-diameter end of the frustoconical core portion supports a fundamental mode and high order multiple modes. The disclosed booster is energized by a pump source configured to emit pump light with such a density that while amplification of the fundamental mode continues in the central area of the core, a peripheral non-overlapped area of the core is bleached. The disclosed booster emits signal light in substantially a fundamental mode.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: April 5, 2016
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Valentin Gapontsev, Igor Samartsev
  • Patent number: 9300105
    Abstract: A pulsed fiber laser apparatus for outputting picosecond laser pulses can comprise a fiber delivered pulsed seed laser for providing picosecond optical seed pulses, and at least one optical fiber amplifier in optical communication with the fiber delivered pulsed seed laser. The optical fiber amplifier can comprise a gain optical fiber that receives and optically amplifies picosecond optical pulses by operating in a nonlinear regime wherein the picosecond optical pulses can be spectrally broadened by a factor of at least 8 during amplification thereof. The apparatus can further comprise a pulse compressor apparatus in optical communication with the optical fiber amplifier for providing compressed picosecond optical pulses.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: March 29, 2016
    Assignee: Fianium Ltd.
    Inventors: John Redvers Clowes, Paulo Almeida, Anatoly Borisovich Grudinin, Pascal Dupriez, Christophe Codemard
  • Patent number: 9234792
    Abstract: A fiber laser system with a fiber laser device including a fiber laser; a laser output end part; and a delivery fiber. The delivery fiber is constituted by a double cladding fiber. An SFBG is provided on the output end side of the delivery fiber, which reflects part of laser light propagating in the core of the delivery fiber to thereby couple the part of the laser light with a backward-propagating cladding mode propagating in a first cladding in a backward direction. A backward-propagating cladding mode detecting section is provided on the input end side of the delivery fiber, which detects the intensity of backward-propagating light in a cladding mode, which light is the part of the laser light coupled by the SFBG with the backward-propagating cladding mode.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: January 12, 2016
    Assignee: FUJIKURA LTD.
    Inventor: Hidenori Miyauchi
  • Patent number: 9214781
    Abstract: Apparatus and method for suppressing modal instabilities (MI) in fiber-amplifier systems. In some embodiments, thermal effects drive the MI process, and in some such embodiments, the present invention provides a plurality of options for mitigating these thermal effects. In some embodiments, the present invention provides a hybrid fiber with a smaller core in the initial length where the thermal loads are highest, followed by a larger-core fiber. In some embodiments the length of the smaller-core section is chosen to keep the core heat-per-unit-length of the second section below a critical value for the onset of MI. In some embodiments, the hybrid fiber of the present invention avoids modal instabilities while yielding almost the same performance as compared to conventional fibers with regard to minimizing fiber nonlinearities such as Stimulated Brillouin Scattering (SBS). In some embodiments, the hybrid fiber outputs a signal beam with at least 1 kW of power.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: December 15, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Eric C. Honea, Matthias P. Savage-Leuchs, Sean M. Courtney, Khushvinder S. Brar, Jason D. Henrie, Christian D. Dilley
  • Patent number: 9203512
    Abstract: An optical transceiver may include logic configured to incorporate a first identifier into a first optical signal and transmit the first optical signal on an optical link. The logic may be further configured to receive a second optical signal via the optical link; retrieve a second identifier from the received second optical signal; determine whether the first identifier matches the second identifier; and report that the optical link is associated with a faulty connection, when the first identifier matches the second identifier.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: December 1, 2015
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Tiejun J. Xia, Glenn A. Wellbrock
  • Patent number: 9128347
    Abstract: A multimoded interference coupler may include: first and second inputs to receive first and second optical signals such that light is not supplied through any portion of a first gap extending between the first and second inputs; first and second outputs to provide first and second components associated with the first and second optical signals, such that light is not output through any portion of a second gap extending between the first and second outputs. The first and second inputs may be separated by a first distance. The first and second outputs may be separated by the first distance. The first input and the second output may be separated by a second distance being different than a third distance separating the second input and the first output. The first and second components may have a phase difference based on a difference between the second and third distances.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: September 8, 2015
    Assignee: Infinera Corporation
    Inventor: Masaki Kato
  • Patent number: 9122024
    Abstract: Disclosed is a bidirectional light transmitting and receiving device which includes a first conductive plate; a second conductive plate; at least one first lead pin which penetrates the first conductive plate and includes a first conductor and a first dielectric surrounding the first conductor; at least one second lead pin which penetrates the second conductive plate and includes a second conductor and a second dielectric surrounding the second conductor; a light receiving unit which is connected with the at least one first lead pin; and a light transmitting unit which is connected with the at least one second lead pin, wherein the first conductive plate is electrically isolated from the second conductive plate.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: September 1, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jong Jin Lee, Kwon-Seob Lim
  • Patent number: 9088131
    Abstract: A high power pump ultra bright low-noise source is configured with a multimode (“MM”) seed source outputting a MM smooth, low-noise signal light at a wavelength ?p in a wavelength range between about 900 and 940 nm, a MM Yb fiber wavelength converter operative to convert emission of a plurality of high power (“HP”) semiconductor laser diodes at a wavelength ?sp to a pump output at the desired wavelength ?p. The Yb-doped MM wavelength converter is configured with noise levels substantially identical to and lower than those of the low-noise signal light, brightness (“B”) substantially equal to n×B, wherein n is a number HP semiconductor laser diodes, and B is brightness of each HP laser diode, and output power (“Po”) substantially equal to nPd, wherein Pd is a power of each HP laser diode, and n is the number thereof.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: July 21, 2015
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Valentin Gapontsev, Igor Samartsev
  • Patent number: 9077150
    Abstract: A high power fiber laser system consisting of multiple fiber amplifier or laser systems amplifying the input signal in parallel is configured with a high power splitter such as to share some of the gain stages. The high power splitting component consists of high power fiber couplers and splitter(s). The splitter is a holographic optical element, a dielectric coated plate, a diffraction grating, or a volume Bragg grating. The resultant fiber laser configuration reduces the total number of amplifying stages including optical isolators and active fiber assemblies for the system and thus reduces the total volume and weight.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: July 7, 2015
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Alex Yusim, Roman Yagodkin
  • Patent number: 9077147
    Abstract: Disclosed is a burst mode oscillation method for burst mode oscillation by controlling the peak output of light pulses in a laser system. The burst mode oscillation apparatus includes a seed beam generator which receives electrical input signals having different pulse widths, modulates pulse widths and amplitudes of outputs in output light according to the received electrical input signals, and outputs the modulated pulse light, an amplifier which amplifies the modulated pulse light and outputs amplified pulse light, and a non-linear wavelength converter which can control wavelength-converted output light according to the amplitudes of the peak output changed through the pulse widths of the amplified pulse light.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: July 7, 2015
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Woojin Shin, Young-Chul Noh, Bong-Ahn Yu, Yeung Lak Lee
  • Patent number: 9054480
    Abstract: A tunable laser configured in a small package coupled to a printed circuit board. The tunable laser includes a housing with a volume formed by exterior walls. An electrical input interface is positioned at the first end of the housing. An optical output interface is positioned at the second end of the housing and configured to transmit a continuous wave optical beam. A semiconductor optical amplifier or gain chip produces an optical output beam, and an optical isolator is positioned directly downstream of the gain chip to prevent the incoming light from the downstream optics from reflecting back though the isolator and into the cavity of the laser. A beam splitter directs a portion of the light transmitted through the isolator back into the other end of the gain chip.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: June 9, 2015
    Assignee: NeoPhotonics Corporation
    Inventor: Andrew John Daiber