Including Optical Waveguide Patents (Class 398/200)
  • Publication number: 20140029953
    Abstract: The invention relates to an optical coupling unit for an arrangement for sending optical signals, including a base unit, a light path formed between a light input and a light output of the base unit and configured to transmit light received via the light input to the light output, an outer light path section included in the light path, which section extends outside the base unit and into which the light transmitted along the light path emerges from the base unit via a light exit and from which the light after passing through the outer light path section enters again into the base unit via a light entry, and a light decoupling element, which is formed in the light path by means of at least one beamsplitting surface coating and configured to decouple a portion of the light transmitted along the light path. Furthermore the invention relates to an arrangement for sending optical signals and to an optical transceiver.
    Type: Application
    Filed: December 20, 2011
    Publication date: January 30, 2014
    Applicant: Le Jupiter, 8, Parc Ariane
    Inventors: Sven Otte, Kai Schamuhn, Andreas Krink, Juergen Blank, Nicola Iwanowski
  • Publication number: 20140023380
    Abstract: A surface emitting semiconductor laser includes: a substrate; a first semiconductor multilayer reflector on the substrate including laminated pairs of a high refractive index layer relatively high in refractive index and a low refractive index layer relatively low in refractive index; an active region on or above the first reflector; a second semiconductor multilayer reflector on or above the active region including laminated pairs of a high refractive index layer relatively high in refractive index and a low refractive index layer relatively low in refractive index; and a cavity extending region formed between the first reflector and the active region or between the second reflector and the active region, having an optical film thickness greater than an oscillation wavelength, extending a cavity length, including a conductive semiconductor material, and including an optical loss causing layer at at least one node of a standing wave of a selected longitudinal mode.
    Type: Application
    Filed: May 6, 2013
    Publication date: January 23, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kazutaka TAKEDA, Takashi Kondo
  • Publication number: 20140016946
    Abstract: A chassis includes a plurality of continuous wave lasers each operable to emit a continuous wave optical beam at the same power as the other lasers, and a plurality of optical couplers operable to input the continuous wave optical beams of the same power and output a plurality of continuous wave optical beams at different powers. The chassis further includes a plurality of optical assemblies operable to modulate the continuous wave optical beams of different powers into a plurality of modulated optical signals at different powers and couple the modulated optical signals onto different length optical mediums so that lower power ones of the modulated optical signals are coupled to shorter ones of the optical mediums and higher power ones of the modulated optical signals are coupled to longer ones of the optical mediums.
    Type: Application
    Filed: July 10, 2012
    Publication date: January 16, 2014
    Inventors: Qing Xu, Robert Brunner, Stephane Lessard
  • Patent number: 8608390
    Abstract: To reduce a size of an optical communication module.<br></br> There is provided an optical communication module 1, which includes a photoelectric conversion element package 10 to which a photoelectric conversion element 12 of either one of a light emitting element and a light receiving element is fitted so as to face one side 11a of a resin base 11, and an optical fiber coupler 20 having a light transmission hole 20c for coupling with an optical fiber in cylindrical portions 20a and 20b and mounted on the one side 11a of the resin base 11, where the photoelectric conversion element 12 and the light transmission hole 20c formed in the optical fiber coupler 20 are assembled aligned with an optical axis K.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: December 17, 2013
    Assignee: Yazaki Corporation
    Inventor: Takahito Saitou
  • Publication number: 20130322891
    Abstract: A method and apparatus for transmitting signals. An apparatus comprises a tube comprising a number of layers of carbon forming a wall of the tube. The number of layers of carbon has a number of optical properties configured to propagate an optical signal and a number of electrical properties configured to conduct an electrical signal.
    Type: Application
    Filed: May 29, 2012
    Publication date: December 5, 2013
    Applicant: THE BOEING COMPANY
    Inventors: Wayne R. Howe, Jeffrey H. Hunt, Angela Wai-an Li
  • Publication number: 20130322888
    Abstract: An optical transmission circuit device generates first and second optical signals from differential set and reset signals each time digital electric input signals of N bits are received. The differential set signal indicates an increase in signal strength relative to immediately preceding N bits of the digital electric input signals and the differential reset signal indicates a decrease in signal strength relative to the immediately preceding N bits. An optical reception circuit device generates first and second digital signals from the first and second optical signals and a third digital signal from the first and second digital signals, a magnitude of the third digital signal being increased by the first digital signal and decreased by the second digital signal. The optical reception circuit further generates a digital output signal of N bits from the third digital signal and an immediately preceding N bits of the digital output signal.
    Type: Application
    Filed: March 1, 2013
    Publication date: December 5, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideto FURUYAMA, Hiroshi UEMURA
  • Publication number: 20130315608
    Abstract: An optical transmission assembly includes a base plate, an optical signal emitting member, an efferent optical fiber, an optical coupler, an afferent optical fiber, and an optical signal receiving member. The optical signal emitting member is mounted on or besides the base plate. The optical signal isolator is mounted on the base plate, and alignes with the optical signal emitting member. The efferent optical fiber is mounted on the base plate. The optical coupler is located besides the base plate, coupling with the optical signal isolator via the efferent optical fiber. The afferent optical fiber is mounted on the base plate. The optical signal receiving member is mounted on or besides the base plate, coupling with the optical coupler via the afferent optical fiber. The present disclosure further includes a bidirectional and double-frequency optical transmission module having the optical transmission assembly.
    Type: Application
    Filed: November 14, 2012
    Publication date: November 28, 2013
    Inventor: KUO-FONG TSENG
  • Publication number: 20130315588
    Abstract: An appliance for optical signal transmission using optical waveguides in explosion-hazard areas, in particular in underground mining, includes an optical transmitter, having an optical output interface for connection of an optical waveguide transmission path and having a device for limiting the light power. An arrangement for bi-directional optical signal transmission is also provided. In order to provide an appliance for optical signal transmission as well as an arrangement for bi-directional optical signal transmission in explosion-hazard areas, complying with the requirements for intrinsically safe operation of the transmission medium when separating or decoupling the transmission medium, the device for limiting the light power is a passive optical component which is connected in the optical signal path between the optical transmitter and the optical output interface.
    Type: Application
    Filed: December 16, 2011
    Publication date: November 28, 2013
    Inventors: Marco Ahler, Henner Rüschkamp, Stefan Kratochvil
  • Publication number: 20130308431
    Abstract: A driver circuit for a laser diode or other optical source comprises a controllable termination for a transmission line coupled between the driver circuit and the optical source, with the controllable termination being switchable between at least first and second termination configurations. The transmission line comprises a first conductor coupled to a first terminal of the optical source and a second conductor coupled to a second terminal of the optical source, and the driver circuit comprises a first current source configured to drive the first conductor, and a second current source configured to drive the second conductor. By way of example, the first termination configuration may comprise an alternating current (AC) termination configuration and the second termination configuration may comprise a direct current (DC) termination configuration.
    Type: Application
    Filed: May 17, 2012
    Publication date: November 21, 2013
    Applicant: LSI Corporation
    Inventor: Jason P. Brenden
  • Publication number: 20130302040
    Abstract: An optical transmission assembly includes a first optical-electrical conversion module, a second optical-electrical conversion module and a optical waveguide connecting the first and the second optical-electrical conversion modules for transmitting optical signals. The first optical-electrical conversion module and the second optical-electrical conversion module each includes a circuit board, an optical signal emitting member, an optical signal receiving member, and a cover. The optical signal emitting member and the optical signal receiving member are mounted on the circuit board. The circuit board defines a positioning groove. The cover includes a latching portion latching with the positioning groove. The cover defines a latching groove. The optical waveguide includes a inserting portion to latch with the latching groove. The present disclosure further provides an optical-electrical conversion module.
    Type: Application
    Filed: October 19, 2012
    Publication date: November 14, 2013
    Inventor: KUO-FONG TSENG
  • Patent number: 8562226
    Abstract: Cable adapters and connectors receive electrical signals and output optical signals. A cable adapter can receive various data signals in multiple interface protocols at a first electrical connector and provide an optical signal at a second connector. The conversion of electrical signals to optical signals may be achieved at various locations in the cable adapter. A connector can include an optical transmitter for converting electrical signals into optical signals. Such a connector can be provided on an output end of a cable adapter to provide optical signals corresponding to electrical signals received at an input connector of the cable adapter.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: October 22, 2013
    Assignee: Apple Inc.
    Inventors: Mathias Schmidt, Stan Rabu
  • Patent number: 8565618
    Abstract: An optical transmitter may include a tunable signal source configured to emit a signal to an optical fiber system; a back scatter detector for measuring an amount of back scatter observed following injection of the signal to the optical fiber system; and control logic. The control logic may be configured to cause the tunable signal source to scan through a range of wavelengths. Measured amounts of back scatter are received for each of the wavelengths. A wavelength corresponding to a peak back scatter amount may be identified and the tunable signal source may be set based on the identified wavelength.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: October 22, 2013
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Tiejun J. Xia, Glenn A. Wellbrock
  • Publication number: 20130236193
    Abstract: Fiber optic communications systems are provided that include an optical transmission source that is configured to transmit an optical signal having a first wavelength onto a multi-mode optical transmission path, an optical mode field converter that is optically coupled to the multi-mode optical transmission path, and an optical transmission medium that is optically coupled to the optical mode field converter. The multi-mode optical transmission path has a first cross-sectional area and the optical transmission medium has a second cross-sectional area that is smaller than the first cross-sectional area. The optical transmission medium is a few-mode transmission medium for the optical signal having the first wavelength.
    Type: Application
    Filed: August 27, 2012
    Publication date: September 12, 2013
    Applicant: CommScope, Inc. of North Carolina
    Inventor: Abhijit Sengupta
  • Publication number: 20130223852
    Abstract: An optical communication transmitting device includes a substrate, a first layer with a first optical refractive index formed on the substrate, a waveguide unit formed with a second optical refractive index formed on the first layer, and a second layer with a third optical refractive index covered on the top of the waveguide unit. The second optical refractive index is greater than the first optical refractive index. The second optical refractive index is greater than the third optical refractive index. The waveguide unit is formed from a photo-resistor layer by a high energy light source exposure.
    Type: Application
    Filed: February 25, 2013
    Publication date: August 29, 2013
    Applicant: PHOTON CHIP, INC.
    Inventor: Photon Chip, Inc.
  • Patent number: 8519803
    Abstract: Tunable resonator systems and methods for tuning resonator systems are disclosed. In one aspect, a resonator system includes an array of resonators disposed adjacent to a waveguide, at least one temperature sensor located adjacent to the array of resonators, and a resonator control electronically connected to the at least one temperature sensor. Each resonator has a resonance frequency in a resonator frequency comb and channels with frequencies in a channel frequency comb are transmitted in the waveguide. Resonance frequencies in the resonator frequency comb are to be adjusted in response to ambient temperature changes detected by the at least one temperature sensors to align the resonance frequency comb with the channel frequency comb.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: August 27, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Moray McLaren, Raymond G. Beausoleil, Marco Fiorentino, Nathan Lorenzo Binkert, Norman Paul Jouppi, Alan Lynn Davis
  • Patent number: 8521038
    Abstract: A robustly stabilized communication laser can output a multimode optical signal remaining aligned to a coordinate of a dense wavelength division multiplexing (“DWDM”) grid while responding to a fluctuating condition or random event, such as, without limitation, exposure to a temperature fluctuation, stray light, or contamination. Responsive to the fluctuating condition, energy can transfer among individual modes in a plurality of aligned longitudinal modes. Modes shifting towards a state of misalignment with the DWDM coordinate can attenuate, while modes shifting towards a state of alignment can gain energy. Fabrication processes and systems and light management, such as beam steering, epoxy scaffolds, spectral adjustments, mode matching, thermal expansion control, alignment technology, etc. can facilitate nano-scale control of device parameters and can support low-cost fabrication.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: August 27, 2013
    Assignee: Cirrex Systems, LLC
    Inventor: Michael L. Wach
  • Publication number: 20130195470
    Abstract: An optical module includes a circuit board having flexibility, a photoelectric conversion element mounted on a mounting surface of the circuit board, a semiconductor circuit element mounted on the mounting surface of the circuit board and electrically connected to the photoelectric conversion element, a plate-shaped optical connection member having a groove into which an end part of an optical fiber is pushed so as to be housed and optically connecting the optical fiber and the photoelectric conversion element, and a supporting member arranged so as to sandwich the optical connection member between the circuit board. The groove is formed between the semiconductor circuit element and the supporting member so as to have an opening into which the optical fiber is pushed at the supporting member side. The semiconductor circuit element has a height from the mounting surface of the circuit board higher than the photoelectric conversion element.
    Type: Application
    Filed: January 18, 2013
    Publication date: August 1, 2013
    Applicant: HITACHI CABLE, LTD.
    Inventor: HITACHI CABLE, LTD.
  • Publication number: 20130183045
    Abstract: A switch is inserted and connected between a first portion and a second portion of an HPD line. The switch connects the first portion to the second portion when an HPD signal is outputted to the second portion. The switch cuts off the connection between the first portion and the second portion when the HPD signal is not outputted to the second portion. An AND gate generates a connection state detection signal that represents the connection state of an HDMI optical active cable, and outputs the connection state detection signal to a switch.
    Type: Application
    Filed: March 11, 2013
    Publication date: July 18, 2013
    Applicant: PANASONIC CORPORATION
    Inventor: PANASONIC CORPORATION
  • Patent number: 8483571
    Abstract: An optical beam splitter for use in an optoelectronic module and method are provided. The optical beam splitter is configured to split a main beam produced by a laser into at least first and second light portions that have different optical power levels. The first light portion, which is to be coupled into an end of a transmit optical fiber of an optical communications link, has an optical power level that is within eye safety limits and yet has sufficient optical power to avoid signal degradation problems. The optical power level of the first light portion is less than the optical power level of the second light portion. The optical beam splitter is capable of being implemented in a unidirectional or a bidirectional optical link.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 9, 2013
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Laurence R. McColloch, Pengyue Wen
  • Publication number: 20130170833
    Abstract: Pairs of distributed feedback (DFB) lasers are provided on a substrate. An arrayed waveguide grating (AWG) is also provided on the substrate having input waveguides, each of which being connected to a corresponding pair of DFB lasers. The wavelengths of optical signals supplied from each pair of DFB lasers may be spectrally spaced from one another by a free spectral range (FSR) of the AWG. By selecting either a first or second DFB laser in a pair and temperature tuning to adjust the wavelength, each pair of DFB lasers can supply optical signals at one of four wavelengths, pairs of which are spectrally spaced from one another by the FSR of the AWG. A widely tunable transmitter may thus be obtained.
    Type: Application
    Filed: December 30, 2011
    Publication date: July 4, 2013
    Inventors: RADHAKRISHNAN L. NAGARAJAN, MASAKI KATO, MICHAEL FRANCIS VAN LEEUWEN, TIMOTHY BUTRIE
  • Patent number: 8478134
    Abstract: An arrangement for providing pulse compression at the output of an optical continuum source (advantageously used in spectral slicing applications) includes a section of higher-order mode (HOM) fiber configured to exhibit a predetermined dispersion in at least a portion of the predetermined wavelength range and an effective area greater than 40 ?m2, the dispersion of the HOM fiber selected to compensate for the dispersion introduced by the optical continuum source. The HOM fiber generates a compressed pulse output therefrom. An input mode converter is used to convert the created continuum from the fundamental mode associated with the conventional continuum sources to the higher-order mode(s) supported by the HOM fiber used to perform pulse compression. A bandpass filter is used to limit the bandwidth of the continuum signal to that associated with both the efficient conversion range of the mode converter and desired dispersion characteristic of the HOM fiber.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: July 2, 2013
    Assignee: OFS Fitel, LLC
    Inventors: Jeffrey W. Nicholson, Siddharth Ramachandran
  • Patent number: 8477030
    Abstract: An optical amplifier module includes a first optical amplifier to amplify main signal light to be supplied to a dispersion compensation fiber (DCF), a second optical amplifier to amplify the main signal light supplied from the DCF, a generating part to generate monitoring light having a wavelength longer than a wavelength of the main signal light, a multiplexing part to multiplex the monitoring light generated by the generating part and the main signal light to be supplied to the DCF, a demultiplexing part to demultiplex the monitoring light from the main signal light supplied from the DCF, and a detection part to detect a light intensity of the monitoring light demultiplexed by the demultiplexing part.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 2, 2013
    Assignee: Fujitsu Limited
    Inventors: Tomotaka Otani, Toshihiro Ohtani
  • Publication number: 20130163997
    Abstract: An optical fiber transmission system includes a light emitting source, a plurality of light receiving terminals, and a plurality of optical fibers connecting the light emitting source to the light receiving terminals. The optical fiber transmission system further includes a plurality of controlling modules positioned between the light receiving terminals and the optical fibers. Each of the plurality of controlling modules includes a controller, a signal analyzer, and a reflective member. The signal analyzer and the reflective member are connected to the controller and analyze and reflect optical signals respectively.
    Type: Application
    Filed: August 15, 2012
    Publication date: June 27, 2013
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: YI-ZHONG SHEU
  • Publication number: 20130148984
    Abstract: A modular device for an optical communication module configured to be coupled to an optical transmission medium. The modular device may include a first edge and a second edge and N number of electrical circuit channels between the first and second edges. Each electrical circuit channel may include at least one element configured to provide functionality for communicating optical signals through the optical transmission medium. The modular device may also have a width between the first and second edges so that each of the N number of electrical circuit channels of C number of modular devices aligns with one of P number of interface channels of an opto-electrical interface configured to be coupled to the optical transmission medium when C equals P/N and C is a whole number greater than zero.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 13, 2013
    Applicant: FINISAR CORPORATION
    Inventor: Finisar Corporation
  • Patent number: 8463138
    Abstract: Provided is a multi-value optical transmitter in which a DC bias may be controlled to be stabilized so as to obtain stable optical transmission signal quality in multi-value modulation using a dual-electrode MZ modulator. The multi-value optical transmitter includes: D/A converters for performing D/A conversion on first and second modulation data which are set based on an input data series, so as to generate a first and a second multi-value signal, respectively; a dual-electrode MZ modulator including phase modulators for modulating light from a light source based on the first multi-value signal and the second multi-value signal, so as to combine optical signals from the phase modulators to output the optical multi-value signal; an optical output power monitor for detecting average power of the optical multi-value signal; and a DC bias control unit for controlling a DC bias for the dual-electrode MZ modulator, so as to maximize the average power.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: June 11, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Sugihara, Soichiro Kametani, Takashi Mizuochi
  • Publication number: 20130142521
    Abstract: An electro-optical single-sideband modulator comprising: an electro-optical substrate; a bimodal optical waveguide structure formed in the substrate to support different optical modes having associated optical frequencies and optical propagation constants and comprising an optical input to receive an input optical carrier signal having an optical frequency, and a pair of optical outputs to output corresponding SSB modulated optical signals, each having an optical frequency spectrum with a single side lobe; and an electrode structure formed on the substrate to receive an input electrical modulating signal having an associated electrical frequency and electrical propagation constant, and to responsively apply an electrical field to the bimodal optical waveguide structure.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 6, 2013
    Applicant: Selex Sistemi Integrati S.p.A.
    Inventor: Selex Sistemi Integrati S.p.A.
  • Patent number: 8451528
    Abstract: Embodiments of the invention provide apparatuses and methods for phase correlated seeding of parametric mixer and for generating coherent frequency combs. The parametric mixer may use two phase-correlated optical waves with different carrier frequencies to generate new optical waves centered at frequencies differing from the input waves, while retaining the input wave coherent properties. In the case when parametric mixer is used to generate frequency combs with small frequency pitch, the phase correlation of the input (seed) waves can be achieved by electro-optical modulator and a single master laser. In the case when frequency comb possessing a frequency pitch that is larger than frequency modulation that can be affected by electro-optic modulator, the phase correlation of the input (seed) waves is achieved by combined use of an electro-optical modulator and injection locking to a single or multiple slave lasers.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 28, 2013
    Assignee: Ram Photonics, LLC
    Inventor: Ping Piu Kuo
  • Patent number: 8447155
    Abstract: An optical device for generating a frequency comb includes an optical source and a first waveguide comprising a nonlinear optical medium operable to mix at least two input optical waves to generate a plurality of first optical waves. The optical device also includes a second waveguide concatenated to the first waveguide and characterized by a first dispersion characteristics and operable to compress the waveforms of the plurality of first optical waves and to reduce a frequency chirp introduced by the first waveguide. The optical device additionally includes a third waveguide concatenated to the second waveguide. The third waveguide comprises a nonlinear optical medium and is operable to mix the plurality of first optical waves to generate a plurality of second optical waves and to increase a total number of second optical waves with respect to a total number of first optical waves.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 21, 2013
    Assignee: Ram Photonics, LLC
    Inventors: Ping Piu Kuo, Yauheni Myslivets
  • Publication number: 20130121702
    Abstract: Disclosed is a transmitter optical module which includes a first package generating an optical signal; a second package bonded with the first package by using chip-to-chip bonding, having a silicon optical circuit platform structure, and amplifying the optical signal; and an optical waveguide forming a transmission path of the optical signal from the first package to the second package.
    Type: Application
    Filed: June 6, 2012
    Publication date: May 16, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Young-Tak HAN, Jang Uk Shin, Sang Ho Park, Oh Kee Kwon, Dong-Hun Lee, Yongsoon Baek
  • Patent number: 8411349
    Abstract: An optical modulator includes an optical modulation substrate, an electrical length adjusting substrate, a package containing the substrates, and a plurality of input ports for inputting high frequency electrical signals. The optical modulation substrate includes a substrate body made of an electro-optic material, a ground electrode and a plurality of signal electrodes provided on the substrate body, optical waveguides propagating lights interacting with the signal electrodes, respectively, and electrode input ports inputting the high frequency electrical signals into the signal electrodes, respectively. The signal electrode includes an interacting part, an input end part provided between the electrode input port and interacting part, and a terminal part. The electrical length adjusting substrate includes conductive lines connected to the input ports for inputting the high frequency electrical signals, respectively.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: April 2, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Osamu Mitomi, Yasunori Iwasaki, Yuji Hori, Kenji Aoki, Jungo Kondo
  • Patent number: 8401399
    Abstract: In various embodiments, a monolithic integrated transmitter, comprising an on-chip laser source and a modulator structure capable of generating advanced modulation format signals based on amplitude and phase modulation are described.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: March 19, 2013
    Assignee: Freedom Photonics, LLC.
    Inventors: Jonathon Barton, Leif Johansson, Milan Mashanovitch
  • Publication number: 20130064554
    Abstract: In some embodiments, an optical transmission system includes a few-mode fiber that supports at least 2 spatial modes but no more than 50 spatial modes.
    Type: Application
    Filed: January 27, 2011
    Publication date: March 14, 2013
    Applicant: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION INC.
    Inventors: Guifang Li, Fatih Yaman, Xiaobo Xie, Likai Zhu, Neng Bai, Cen Xia
  • Patent number: 8396338
    Abstract: An opto-electric hybrid module capable of shortening the distance between a light-emitting section or a light-receiving section of a semiconductor chip and a reflecting surface formed in a core to reduce optical losses between an opto-electric conversion substrate section and an optical waveguide section, and a method of manufacturing the same. A recessed portion (3a) is formed in a surface of an over cladding layer (3) of the optical waveguide section (W1). At least part of the light-emitting section (7a) or the light-receiving section of the semiconductor chip (7) for opto-electric conversion and at least part of a loop portion (8a) of a bonding wire (8) in the opto-electric conversion substrate section (E1) are positioned within the recessed portion (3a). This brings the light-emitting section (7a) or the light-receiving section of the semiconductor chip (7) and the reflecting surface (2a) formed in the core (2) closer to each other.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: March 12, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Hajime Nishio, Masayuki Hodono
  • Patent number: 8385752
    Abstract: An LD-Driver with a back termination circuit is disclosed. The back termination circuit of the invention provides a transistor as an active device, a current source to provide a bias current to the transistor, and a resistor as a passive element that couples the transmission lines carrying a differential signal thereon. Because the transistor shows a differential resistance of several tens of ohms by providing only a few milli-amperes, the output impedance of the LD-Driver may be substantially matched with the characteristic impedance of the transmission line with lesser additional power consumption.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: February 26, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Keiji Tanaka
  • Publication number: 20130039664
    Abstract: Tensile strained germanium is provided that can be sufficiently strained to provide a nearly direct band gap material or a direct band gap material. Compressively stressed or tensile stressed stressor materials in contact with germanium regions induce uniaxial or biaxial tensile strain in the germanium regions. Stressor materials may include silicon nitride or silicon germanium. The resulting strained germanium structure can be used to emit or detect photons including, for example, generating photons within a resonant cavity to provide a laser.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Inventors: Paul A. Clifton, Andreas Goebel, R. Stockton Gaines
  • Publication number: 20130011026
    Abstract: A data transmission between a device and a first and a second optical maintenance port involves a transmission reflector in the form of a solid-state bound data line having a gap and a Y coupler. This allows recording of the communication between the device to be read out and the first optical maintenance port in real time by means of the second optical port. Likewise, communication by means of electromagnetic energy is possible between the first and the second optical maintenance ports.
    Type: Application
    Filed: July 5, 2012
    Publication date: January 10, 2013
    Applicant: EADS Deutschland GmbH
    Inventor: Helmut PLANKL
  • Patent number: 8346041
    Abstract: The present invention relates to an optical communications system that allows improving OSNR while suppressing the power increase of pumping light for distributed Raman amplification. In the optical communications system, an optical fiber is laid in a transmission section between a transmitter station (or repeater station) and a receiver station (or repeater station), and optical signals are transmitted from the transmitter station to the receiver station via the optical fiber. In the optical communications system, pumping light for Raman amplification, outputted by a pumping light source provided in the receiver station, is fed into the optical fiber via an optical coupler, and the optical signals are distributed-Raman-amplified in the optical fiber. The transmission loss and the effective area of the optical fiber satisfy, at the wavelength of 1550 nm, a predetermined relationship.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: January 1, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Eisuke Sasaoka, Kazuya Kuwahara
  • Patent number: 8337096
    Abstract: An apparatus comprising a carrier comprising at least one heat-generating component and a thermoelectric cooler (TEC) coupled to a surface of the carrier, wherein the cross-sectional area of the TEC is less than the cross-sectional area of the carrier, and wherein the TEC is aligned with the heat-generating component. Included is an apparatus comprising a carrier comprising a plurality of optical transmitters and an active component, at least one TEC coupled to the surface of the carrier, and a support post coupled to the surface of the carrier, wherein the support post has a higher thermal resistivity than the TEC, wherein the cross-sectional area of the TEC is less than the cross-sectional area of the carrier, and wherein the TEC is aligned with the optical transmitters, the active component, or both.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: December 25, 2012
    Assignee: Futurewei Technologies, Inc.
    Inventors: Xiao A. Shen, Hongbing Lei, Yu Sheng Bai
  • Patent number: 8335434
    Abstract: Various embodiments of the present invention are directed to systems and methods for all optical distributed arbitration for computer system components (1801-1804) communicatively coupled via a photonic interconnect in a computer system device. The embodiments of the optical arbitration in the computer system provides arbitration schemes with fixed priority (2000) and non-fixed priority (1830, 2200). The non-fixed priority scheme embodiments can provide fairness in arbitration. In some embodiments, delivery of light power and arbitration are combined (1830, 2001).
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: December 18, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Raymond G. Beausoleil, Marco Fiorentino, Norman Paul Jouppi, Nathan Lorenzo Binkert, Robert Samuel Schreiber, Qianfan Xu
  • Patent number: 8335410
    Abstract: An opto-electric hybrid module capable of shortening the distance between a light-emitting section or a light-receiving section of a semiconductor chip and a reflecting surface formed in a core to reduce optical losses between an opto-electric conversion substrate section and an optical waveguide section, and a method of manufacturing the same. A recessed portion (3a) is formed in a surface of an over cladding layer (3) of the optical waveguide section (W1). At least part of the light-emitting section (7a) or the light-receiving section of the semiconductor chip (7) for opto-electric conversion and at least part of a loop portion (8a) of a bonding wire (8) in the opto-electric conversion substrate section (E1) are positioned within the recessed portion (3a). This brings the light-emitting section (7a) or the light-receiving section of the semiconductor chip (7) and the reflecting surface (2a) formed in the core (2) closer to each other.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: December 18, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Hajime Nishio, Masayuki Hodono
  • Patent number: 8320772
    Abstract: An optical transmission apparatus according to the present invention comprises: a plurality of optical modulating sections serially connected to each other via optical fibers; driving sections corresponding to the optical modulating sections; delay amount varying sections that provide variable delay amounts for modulating signals to be input to the driving sections, to adjust timing between drive signals to be provided for the optical modulating sections; temperature monitoring sections that monitor the temperature of each of the optical fibers and the like; and a delay amount control section that controls the delay amount in each of the delay amount varying sections based on the monitored temperatures.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: November 27, 2012
    Assignees: Fujitsu Limited, Yokogawa Electric Corporation
    Inventors: Hiroki Ooi, George Ishikawa, Daisuke Tanimura, Hirotoshi Kodaka
  • Publication number: 20120275799
    Abstract: An electric energy storage system for a vehicle, such as an electric or hybrid vehicle. The energy storage system has multiple electric components and data transmission devices for transmitting data signals between the electric components. Here, the data transmission devices include at least one transmission link for electromagnetic radiation to transmit data signals.
    Type: Application
    Filed: December 9, 2010
    Publication date: November 1, 2012
    Applicant: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Simon Abraham, Sven Bergmann, Michael Schiemann, Hans-Georg Schweiger
  • Patent number: 8295710
    Abstract: The invention describes a modulator for the quadrature modulation of an optical carrier signal with an I- and a Q-portion, where a first optical multimode interferometer (MMI) splits the optical carrier signal into four branches and that in pairs of branches the I-portion and the Q-portion respectively is modulated with a Mach-Zehnder-Structure and a second optical multimode interferometer (MMI) combines the modulated I-portion and Q-portion again to one quadrature modulated optical output signal (OS).
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: October 23, 2012
    Assignee: Nokia Siemens Networks Oy
    Inventor: Winter Marcus
  • Patent number: 8295704
    Abstract: A laser unit, usable in a network interface unit (NIU), that includes a laser adapted to generate an optical signal having a wavelength, a temperature control system for establishing a temperature of the laser and a controller functionally connected to the temperature control system for setting the temperature, the controller configured to automatically vary the temperature between a high temperature and a low temperature different than the high temperature. Also an NIU and a system of NIU's including the laser and an associated method of controlling the laser.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: October 23, 2012
    Assignee: CommScope, Inc. of North Carolina
    Inventor: Mark Vogel
  • Publication number: 20120263466
    Abstract: Systems and methods are disclosed with a spatial-domain-based multi-dimensional coded-modulation scheme that improves dramatically OSNR sensitivity and tolerance to fiber nonlinearities by using D-dimensional signal constellations, where D=2(2+M)N. The factor 2 originates from two polarizations, 2+M electrical basis functions are selected (2 in-phase/quadrature channels and M pulse-position like basis functions), and N represents the number of orbital angular momentum (OAM) states used in FMFs/MMFs. For single mode fiber applications N is 1.
    Type: Application
    Filed: April 6, 2012
    Publication date: October 18, 2012
    Applicant: NEC LABORATORIES AMERICA, INC.
    Inventors: Ivan B. Djordjevic, Lei Xu, Ting Wang
  • Publication number: 20120263206
    Abstract: A surface-emission laser diode includes a GaAs substrate, a cavity region, and upper and lower reflectors provided at a top part and a bottom part of the cavity region, the upper reflector and/or the lower reflector including a semiconductor Bragg reflector, at least a part of the semiconductor distributed Bragg reflector includes a semiconductor layer containing Al, Ga and As as major components, there being provided, between the active layer and the semiconductor layer that contains Al, Ga and As as major components, a semiconductor layer containing Al, In and P as major components adjacent to the semiconductor layer that contains Al, Ga and As as major components, with an interface formed coincident to a location of a node of electric strength distribution.
    Type: Application
    Filed: April 30, 2012
    Publication date: October 18, 2012
    Applicant: RICOH COMPANY, LTD
    Inventors: Shunichi SATO, Akihiro Itoh, Naoto Jikutani
  • Patent number: 8285151
    Abstract: An integrated DWDM transmitter apparatus includes a silica-on-silicon substrate overlying a first support component. The silica-on-silicon substrate includes a silica layer overlying a silicon layer. A coefficient of thermal expansion of the first support component is substantially matched to a coefficient of thermal expansion of the silicon layer. An optical multiplexer is located within the silica layer and includes a plurality of input waveguides and at least an output waveguide. Additionally, the apparatus includes a second support component attached to a side surface of the first support component. One or more semiconductor laser array chips overlie the second support component. A coefficient of thermal expansion of the one or more semiconductor chips is substantially matched to a coefficient of thermal expansion of the second support component.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: October 9, 2012
    Assignee: Futurewei Technologies, Inc.
    Inventors: Xiao Andy Shen, Yu Sheng Bai
  • Patent number: 8285149
    Abstract: An integrated DWDM transmitter apparatus includes a support component and a silica-on-silicon substrate overlying the support component. The support component includes a temperature adjustment component. The silica-on-silicon substrate overlies the support component and includes a silica layer and a silicon layer. The silica-on-silicon substrate includes a corresponding a substrate surface which includes a first surface region and a second surface region. In an embodiment, the two surface regions are not coplanar. The transmitter apparatus includes an optical multiplexer within the silica layer, the optical multiplexer including a plurality of input waveguides and at least an output waveguide. The transmitter apparatus also includes one or more semiconductor laser array chips overlying the first surface region of the silica-on-silicon substrate. Each of the laser array chips including two or more lasers, which are optically coupled to corresponding ones of the plurality of input waveguides.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: October 9, 2012
    Assignee: Futurewei Technologies, Inc.
    Inventor: Yu Sheng Bai
  • Patent number: 8285150
    Abstract: An integrated DWDM transmitter apparatus includes a support component and a silica-on-silicon substrate overlying the support component. The support component includes a temperature adjustment component. The silica-on-silicon substrate overlies the support component and includes a silica layer and a silicon layer. The silica-on-silicon substrate includes a corresponding a substrate surface which includes a first surface region and a second surface region. In an embodiment, the two surface regions are not coplanar. The transmitter apparatus includes an optical multiplexer within the silica layer, the optical multiplexer including a plurality of input waveguides and at least an output waveguide. The transmitter apparatus also includes one or more semiconductor laser array chips overlying the first surface region of the silica-on-silicon substrate. Each of the laser array chips including two or more lasers, which are optically coupled to corresponding ones of the plurality of input waveguides.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: October 9, 2012
    Assignee: Futurewei Technologies, Inc.
    Inventor: Yu Sheng Bai
  • Patent number: RE44472
    Abstract: An apparatus for transmission of free space optical communication system signals employing a spatially-extended light source and method of using the same. A laser beam source directs an optical signal into a free end of a segment of multimode fiber. As the optical signal passes through the segment of multimode fiber, the optical signal is converted into a mode-scrambled optical signal. This mode-scrambled signal may then be used as a spatially-extended light source that is directed outward as an optical beam through the use of a collimating lens.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: September 3, 2013
    Assignee: Pertex Telecommunication LLC
    Inventors: Robert M. Pierce, John A. Bell, Carrie Jean Sjaarda, David Rush