Input/output Coupler Patents (Class 385/31)
  • Patent number: 8885996
    Abstract: An optical multiplexer/de-multiplexer (MUX/de-MUX) includes a two-dimensional pattern of features in a propagation region that conveys an optical signal having wavelengths. A given feature in this pattern has a characteristic length and the features have an average pitch, both of which are less than fundamental smallest of the wavelengths divided by an effective index of refraction of the propagation region. Moreover, an optical device in the optical MUX/de-MUX images and diffracts the optical signal using a reflective geometry, and provides the imaged and diffracted optical signal to output ports. For example, the optical device may include an echelle grating.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: November 11, 2014
    Assignee: Oracle International Corporation
    Inventors: Guoliang Li, Ying L. Luo, Xuezhe Zheng, Ashok V. Krishnamoorthy
  • Publication number: 20140327970
    Abstract: A binocular display includes a waveguide. A convex spherical mount has a fixed position relative to the waveguide. A light engine includes a concave spherical mount that adjustably mates with the convex spherical mount.
    Type: Application
    Filed: May 2, 2013
    Publication date: November 6, 2014
    Inventors: David D. Bohn, Steve Robbins
  • Publication number: 20140328558
    Abstract: An optical receptacle disposed between a photoelectric conversion device and an optical fiber includes a light separating section for separating incident light into monitor light and fiber coupled light, which section includes a segmented reflective surface and a segmented transmitting surface. The reflective surface for reflecting light as monitor light is disposed in a segmented manner with spaces in a segmentation direction. The transmitting surface is disposed in a segmented manner in areas where the reflective surface is not disposed, so as to transmit a portion of light other than the reflected light in a direction directly oppose to the direction of the reflected light and to advance the other portion of light towards the side of an end face of the optical fiber.
    Type: Application
    Filed: November 12, 2012
    Publication date: November 6, 2014
    Applicant: ENPLAS CORPORATION
    Inventors: Shimpei Morioka, Tadanobu Niimi, Shinya Kanke, Masahiro Tanazawa
  • Patent number: 8876810
    Abstract: A device and method are provided which achieve tissue ablation as well as tissue coagulation substantially simultaneously during the treatment of BPH by utilizing at least two wavelengths of light. The device and method improve urinary flow and minimize post-treatment blood loss and edema while maintaining a nearly blood-free operating field during treatment by irradiating substantially simultaneously with at least two different wavelengths of light. According to the present invention, tissue ablation is affected by having one wavelength that is highly absorbed in the prostatic tissue while another less highly absorbed wavelength coagulates surrounding tissues while maintaining minimal thermal damage to surrounding tissue. In a preferred embodiment the highly absorbed wavelength is about 1460 nm and the less absorbed by water but with some significant hemoglobin absorption is about 980 nm. This combination aids the patient by reducing blood loss and edema.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: November 4, 2014
    Assignee: Biolitec Pharma Marketing Ltd
    Inventor: Wolfgang Neuberger
  • Publication number: 20140321807
    Abstract: The optical waveguide with mirror 10 of the present invention includes: a lower clad layer 22; a core pattern 24 formed above the lower clad layer 22; a mirror 30 formed on the inclined surface 31 of the core pattern 24; an upper clad layer 26 covering the part other than the mirror 30 on the core pattern 24; and an opening 26a with an approximate pillar shape, the opening being formed on the upper clad layer 26, wherein the mirror 30 is formed in the opening 26a.
    Type: Application
    Filed: December 28, 2012
    Publication date: October 30, 2014
    Inventors: Daichi Sakai, Hiroshi Betsui, Toshihiro Kuroda, Kouta Segawa, Masao Uchigasaki
  • Patent number: 8873906
    Abstract: Disclosed is an optical conversion element capable of highly efficient optical coupling between a silicon waveguide and a general single-mode optical fiber only by butt-coupling without requiring anti-reflective coating. One embodiment is an optical conversion element that includes a waveguide structure and converts a mode field of guided light and is characterized in that at least a dual core is included, an innermost core of the dual core is a silicon inverse tapered thin wire core, a first outer core is a forward tapered ridge core having a ridge structure formed of an oxide film with only width of the ridge core changing. The first outer core is positioned on a narrow width side of the innermost core.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: October 28, 2014
    Assignee: NEC Corporation
    Inventors: Masatoshi Tokushima, Shigeru Nakamura
  • Patent number: 8873909
    Abstract: Micro-optic filtering devices and the method of making the same are described. In one aspect, the invention is related to techniques of obtaining low-loss coupling optics, packaging structure and process to secure components constituting a micro-optic fiber device. To support and fix various components in a fiber optic device, tubes are used to facilitate the manufacturability of these optical devices. These tubes may be metal tubes or glass tubes.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: October 28, 2014
    Assignee: Alliance Fiber Optic Products, Inc.
    Inventors: Daoyi Wang, Shiping Zhang, Yao Li
  • Publication number: 20140314373
    Abstract: An optical communication apparatus includes a PCB, a photoelectric element, a driver chip, and a light waveguide. The PCB defines a groove in a surface thereof. The groove includes a bottom surface and a side surface connected to the bottom surface. The PCB includes a reflecting layer coated on the side surface. The photoelectric element includes an optical portion for emitting/receiving light carrying optical signals. An optical signal emitting/receiving direction of the photoelectric element is substantially perpendicular to the surface of the PCB. The side surface passes through a projection area of the optical portion along a direction substantially perpendicular to the surface of the PCB. An end of the light waveguide is positioned on the bottom surface of the groove and is out of the projection area of the optical portion. The reflecting layer couples optical signals between the photoelectric element and the light waveguide.
    Type: Application
    Filed: December 11, 2013
    Publication date: October 23, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: KUO-FONG TSENG
  • Patent number: 8867875
    Abstract: A semiconductor optical wave guide device is described in which a buried oxide layer (BOX) is capable of guiding light. Optical signals may be transmitted from one part of the semiconductor device to another, or with a point external to the semiconductor device, via the wave guide. In one example, an optical wave guide is provided including a core insulating layer encompassed by a clad insulating layer. The semiconductor device may contain an etched hole for guiding light to and from the core insulating layer from a transmitter or to a receiver.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: October 21, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yoshiaki Shimooka
  • Patent number: 8867874
    Abstract: Method for modifying the splitting or combining ratio of a first multimode interference (MMI) coupler (100), which first coupler is arranged to convey light from one or several input waveguides to one or several output waveguides, wherein a film (103a) of a material is arranged over the first coupler, wherein the film is strained so that a force is applied by the film to the surface of the first coupler, and so that the refractive index profile in the material of the first coupler changes as a consequence of the force, and wherein the splitting or combining ratio is modified as a consequence of the changed refractive index profile.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: October 21, 2014
    Assignee: Finisar Sweden AB
    Inventors: Dave Adams, Jan-Olof Wesstrom
  • Patent number: 8867872
    Abstract: An optical apparatus comprises: source, primary, and secondary waveguides formed in waveguide layers on a substrate; a light source; and an optical waveguide tap. The light source launches a source optical signal along the source waveguide. The tap divides the source optical signal into a primary optical signal in the primary waveguide and a secondary optical signal in the secondary waveguide. The secondary optical signal emerges from the secondary waveguide to exit the waveguide layers at the substrate edge or to propagate within the waveguide layers as a stray optical signal without confinement by any waveguide. The stray optical signal propagates thusly unconfined into the open mouth of an optical trap that comprises one or more lateral surfaces formed in the waveguide layers and an opaque coating on the lateral surfaces, and comprises a spiral region of the optical waveguide layers with an open mouth and closed end.
    Type: Grant
    Filed: October 27, 2012
    Date of Patent: October 21, 2014
    Assignee: HOYA Corporation USA
    Inventors: Peter C. Sercel, Toshiaki Sonehara, Rolf A. Wyss
  • Patent number: 8861906
    Abstract: A method and system for coupling optical signals into silicon optoelectronic chips are disclosed and may include coupling one or more optical signals into a back surface of a CMOS photonic chip in a photonic transceiver, wherein photonic, electronic, or optoelectronic devices may be integrated in a front surface of the CMOS photonic chip. Optical couplers, such as grating couplers, may receive the optical signals in the front surface of the chip. The optical signals may be coupled into the back surface of the chips via optical fibers and/or optical source assemblies. The optical signals may be coupled to the optical couplers via a light path etched in the chips, which may be refilled with silicon dioxide. The chips may be flip-chip bonded to a packaging substrate. Optical signals may be reflected back to the optical couplers via metal reflectors, which may be integrated in dielectric layers on the chips.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: October 14, 2014
    Assignee: Luxtera, Inc.
    Inventors: Thierry Pinguet, Attila Mekis, Steffen Gloeckner
  • Patent number: 8861907
    Abstract: In one embodiment, an apparatus may include an optical fiber that may have a surface non-normal to a longitudinal axis of a distal end portion of the optical fiber. The surface may define a portion of an interface configured to redirect electromagnetic radiation propagated from within the optical fiber and incident on the interface to a direction offset from the longitudinal axis. The apparatus may also include a doped silica cap that may be fused to the optical fiber such that the surface of the optical fiber may be disposed within a cavity defined by the doped silica cap.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: October 14, 2014
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Jeffrey W. Zerfas, Richard P. Tumminelli
  • Patent number: 8861081
    Abstract: There is provided a light-guide, compact collimating optical device, including a light-guide having a light-waves entrance surface, a light-waves exit surface and a plurality of external surfaces, a light-waves reflecting surface carried by the light-guide at one of the external surfaces, two retardation plates carried by light-guides on a portion of the external surfaces, a light-waves polarizing beamsplitter disposed at an angle to one of the light-waves entrance or exit surfaces, and a light-waves collimating component covering a portion of one of the retardation plates. A system including the optical device and a substrate, is also provided.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: October 14, 2014
    Assignee: Lumus Ltd
    Inventors: Mali Mansharof, Naamah Levin, Yaakov Amitai
  • Publication number: 20140301697
    Abstract: The invention is a method for structuring a flat substrate composed of glass material in the course of a viscous flow process. The glass flat substrate is joined to a surface of a flat substrate, which is preferably a semiconductor flat substrate, having at least one depression bounded by a circumferential edge located in the surface. In the course of a subsequent tempering process, glass material is changed to a viscous free-flowing state in which at least proportions of the free-flowing glass material of the flat substrate flow over the circumferential edge into the depression in the flat substrate.
    Type: Application
    Filed: August 2, 2012
    Publication date: October 9, 2014
    Inventors: Norman Marenco, Hans-Joachim Quenzer
  • Patent number: 8855450
    Abstract: A system for measuring properties of a thin film coated glass having a light source, a spectrometer, at least one pair of probes, a first optical fiber switch and a second optical fiber switch. The pair of probes includes a first probe located on one side of a glass sheet and a second probe located on the opposite side of the glass sheet, directly across from the first probe. The first and second optical fiber switches are adapted to couple either probe to the light source and/or the spectrometer. Because the design of the system is optically symmetrical, calibration may be performed without the use of a reference material such as a tile or mirror. Each of the first and second probes has a first leg and a second leg that are separated from each other by a distance n so that angled reflections may be detected.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: October 7, 2014
    Assignee: Cardinal CG Company
    Inventors: Jordan B. Lagerman, Keith J. Burrows, Kyle R. Thering
  • Patent number: 8849079
    Abstract: A light diffusing element diffuses light output from an output facet of an optical fiber that enters the light diffusing element at a first end and outputting the diffused light from a second end. The light diffusing element is equipped with a semireflective surface for reflecting a portion of the light, provided at a predetermined portion of the light diffusing element corresponding to the core of the output facet. The semireflective surface intersects at least with the optical axis of the optical fiber. Thereby, propagation of light in directions away from the optical axis of the optical fiber can be promoted during the step of reflecting the portion of the light that enters the light diffusing element.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: September 30, 2014
    Assignee: Fujifilm Corporation
    Inventors: Koji Yoshida, Tadashi Kasamatsu, Tatsuya Yoshihiro
  • Patent number: 8849080
    Abstract: An optical fiber coupler includes a clad optical fiber core having a coupling window formed therein. A laser source is joined to emit light into the core through the coupling window. The core has an output coupler for partially reflecting a portion of light and transmitting a portion as output. A Bragg grating is formed in the core having a pitch and being positioned to reflect light from said laser source toward the output coupler. The pitch is variable in response to a temperature change. A thermal control device is joined to the core for adjusting its temperature and the Bragg grating pitch. In other embodiments a mode convertor is provided to reduce the output modes to selected modes.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: September 30, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Tariq Manzur
  • Publication number: 20140270639
    Abstract: The invention relates to an optical scattering element suitable for dispersing or scattering light transmitted by optical device by Mie scattering. The optical scattering element comprises a phase-separated or porous borosilicate glass having dispersed phase particles with a particle size of 200 to 500 nanometers or pores with a size of 200 to 500 nanometers, at a number density of 108 to 1012 mm?3. The optical scattering element can be prepared by subjecting a borosilicate glass to a controlled heat treatment to induce phase separation, and then optionally leaching out one of the phases with an acid leach. The optical scattering element can be, for example, attached to an end of an optical fiber or bundle of optical fibers. The invention also relates to a method of dispersing or scattering light by transmitting the light through the optical scattering element.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: SCHOTT CORPORATION
    Inventors: William H. JAMES, III, Elizabeth CHASE, Mark J. DAVIS, Paula VULLO, Sally PUCILOWSKI, Eric Hector URRUTI
  • Publication number: 20140270640
    Abstract: An electronic device may be provided with imaging modules or communications modules. Imaging modules and communications modules may be improved with the use of plasmonic light collectors. Plasmonic light collectors exploit the interaction between incoming light and plasmons in the plasmonic light collector to redirect the path of the incoming light. Plasmonic light collectors may be used to form lenses for image pixels in an imaging module or to form light pipes or lenses for use in injecting optical communications into a fiber optic cable. Plasmonic lenses may be formed by lithography of metallic surfaces by implantation or by stacking and patterning of layers of materials having different dielectric properties. Plasmonic image pixels may be smaller and more efficient than conventional image pixels. Plasmonic light guides may have significantly less signal loss than conventional lenses and light guides.
    Type: Application
    Filed: March 21, 2014
    Publication date: September 18, 2014
    Applicant: Aptina Imaging Corporation
    Inventor: Kenneth Edward Salsman
  • Patent number: 8837885
    Abstract: The inventive concept provides optic couplers, optical fiber laser devices, and active optical modules using the same. The optic coupler may include a first optical fiber having a first core and a first cladding surrounding the first core, a second optical fiber having a second core transmitting a signal light to the first optical fiber and a third cladding surrounding the second core, third optical fibers transmitting pump-light to the first optical fiber in a direction parallel to the second optical fiber; and a connector connected between the first optical fiber and the second optical fiber, the connector extending the third optical fibers disposed around the second optical fiber toward the first optical fiber, the connector comprising a third core connected between the first core and the second core and a fifth cladding surrounding the third core.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: September 16, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hong Seok Seo, Bong Je Park, Joon Tae Ahn, Jung-Ho Song
  • Patent number: 8837884
    Abstract: The optical semiconductor device includes a spot-size converter formed on a semiconductor substrate. The spot-size converter has a multilayer structure including a light transition region. The multilayer structure includes a lower core layer, and an upper core layer having a refractive index higher than that of the lower core layer. The width of the upper core layer is gradually decreased and the width of the lower core layer is gradually increased in the light transition region. Both sides and an upper side of the multilayer structure are buried by a semi-insulating semiconductor layer in the light transition region. Light incident from one end section of the spot-size converter is propagated to the upper core layer. The light transits from the upper core layer to the lower core layer in the light transition region, is propagated to the lower core layer, and exits from the other end section thereof.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: September 16, 2014
    Assignee: Oclaro Japan, Inc.
    Inventors: Takanori Suzuki, Takafumi Taniguchi
  • Publication number: 20140254984
    Abstract: An optical coupling system having an optical coupler and a light-transmissive external medium, the optical coupler comprising a light guide which extends parallel to a main plane of the optical coupler, a mirror surface which is inclined relative to the main plane by an angle of inclination and an outer surface of the coupler which abuts on the medium, the waveguide.
    Type: Application
    Filed: December 20, 2013
    Publication date: September 11, 2014
    Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventor: Hans-Herrmann Oppermann
  • Patent number: 8831387
    Abstract: In one embodiment, in an optical device, a bar-shaped optical waveguide has either a polygonal or circular cross-sectional shape. A light entry portion is formed in a circumferential area of a first-end surface of the optical waveguide. The light entry portion includes a sloping surface having a normal vector containing a component in a circumferential direction of the first-end surface. An incident light beam travels towards a second-end surface of the optical waveguide while repeating total reflections on a side surface of the optical waveguide. The incident light beam travels without passing through a central portion in a cross section of the optical waveguide. A light exit portion is formed in the side surface of the optical waveguide. The light exit portion is configured to let the light beam in the optical waveguide out of the optical waveguide.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: September 9, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Nakai, Tsuyoshi Hioki
  • Patent number: 8827572
    Abstract: A side-coupling optical fiber assembly comprises a first substrate (200), on a surface of which at least one concave groove is provided; an optical fiber (210) disposed in the concave groove; and a second substrate (220) disposed on the first substrate (200) and pressed on the optical fiber (210). The end of the optical fiber (210) between the first substrate (200) and the second substrate (220) is set as a slant surface (240), which is used for performing total reflection for the light beam transmitted in the optical fiber (210). A method for making the side-coupling optical fiber assembly is provided.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: September 9, 2014
    Assignee: Wuhan Telecommunication Devices Co., Ltd.
    Inventor: Dan Zhou
  • Patent number: 8829393
    Abstract: The thermal processing device includes a stage, a continuous wave electromagnetic radiation source, a series of lenses, a translation mechanism, a detection module, a three-dimensional auto-focus, and a computer system. The stage is configured to receive a substrate thereon. The continuous wave electromagnetic radiation source is disposed adjacent the stage, and is configured to emit continuous wave electromagnetic radiation along a path towards the substrate. The series of lenses is disposed between the continuous wave electromagnetic radiation source and the stage, and are configured to condense the continuous wave electromagnetic radiation into a line of continuous wave electromagnetic radiation on a surface of the substrate. The translation mechanism is configured to translate the stage and the line of continuous wave electromagnetic radiation relative to one another. The detection module is positioned within the path, and is configured to detect continuous wave electromagnetic radiation.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: September 9, 2014
    Assignee: Applied Materials, Inc.
    Inventors: Dean C. Jennings, Mark Yam, Abhilash J. Mayur, Vernon Behrens, Paul A. O'Brien, Leonid M. Tertitski, Alexander Goldin
  • Patent number: 8824839
    Abstract: An optical coupling device includes an optical fiber holder configured to hold an optical fiber, a wavelength conversion member including a phosphor and an optical characteristic matching member and a wavelength conversion member holder configured to hold the wavelength conversion member. The optical coupling device includes a first region which is formed on an end face of the optical fiber and an end face of the wavelength conversion member, which are optically coupled, when bonding the optical fiber holder and the wavelength conversion member holder, and in which foreign bodies that shield the laser beam are removed from an optical axis of the optical fiber and an optical axis of the wavelength conversion member and a second region which is formed outside the first region when bonding the optical fiber holder and the wavelength conversion member holder, and in which the foreign bodies removed from the first region flow.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: September 2, 2014
    Assignee: Olympus Corporation
    Inventor: Yoshinori Tanaka
  • Patent number: 8818149
    Abstract: Exemplary apparatus for obtaining information for a structure can be provided. For example, the exemplary apparatus can include at least one first optical fiber arrangement which is configured to transceive at least one first electro-magnetic radiation, and can include at least one fiber. The exemplary apparatus can also include at least one second focusing arrangement in optical communication with the optical fiber arrangement. The second arrangement can include a ball lens, and be configured to focus and provide there through the first electro-magnetic radiation to generate the focused electro-magnetic radiation. Further, the exemplary apparatus can include at least at least one dispersive third arrangement which can receive a particular radiation (e.g., the first electro-magnetic radiation(s) and/or the focused electro-magnetic radiation), and forward a dispersed radiation thereof to at least one section of the structure.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: August 26, 2014
    Assignee: The General Hospital Corporation
    Inventors: Milen Shishkov, Guillermo J. Tearney, Brett Eugene Bouma, Dvir Yelin, Nicusor Iftimia
  • Patent number: 8818151
    Abstract: An novel fiber pump signal combiner is disclosed in which a fiber bundle array is coupled to a double-clad fiber with a taper section that is formed by etching a tapered outer surface into the cladding of a fiber rod to produce a high quality tapered outer surface free of defects with an inner core that has a constant diameter.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: August 26, 2014
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Benjamin G. Ward
  • Publication number: 20140233886
    Abstract: The invention relates to methods and devices for shaping plastic optical fibres (POFs), more specifically for optically modifying and yet more specifically for rapidly joining two portions of the plastic optical fibres to create a new optical connection. The plastic optical fibres may be heated under controlled conditions, to soften them and lens, sensor or patterns may be imprinted on portions of the fibre. Methods are provide to optical joints, and combined physical and optical joints.
    Type: Application
    Filed: September 20, 2012
    Publication date: August 21, 2014
    Applicant: BAE SYSTEMS PLC
    Inventors: Henry Jameson White, Geoffrey Martland Proudley, Ying Lia Li
  • Patent number: 8805141
    Abstract: An illumination system that includes at least one light-diffusing optical fiber is disclosed. The illumination system includes at least one low-scatter light-conducting optical fiber that optically couples the at least one light-diffusing optical fiber to at least one light source. The light-diffusing optical fiber includes a light-source fiber portion having a length over which scattered light is continuously emitted. The light-source fiber portion can be bent, including wound into a coil shape. The light-diffusing optical fiber includes a plurality of nano-sized structures configured to scatter guided light traveling within the light-diffusing optical fiber out of an outer surface of the fiber.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: August 12, 2014
    Assignee: Corning Incorporated
    Inventors: Edward John Fewkes, Stephan Lvovich Logunov, Alranzo Boh Ruffin
  • Patent number: 8805131
    Abstract: An optical module includes an optical waveguide that transmits and outputs signal light; a circuit board that transmits the signal light output from the optical waveguide, and includes a low refractive-index portion that neighbors and surrounds a transmissive portion and has a lower refractive index than the transmissive portion, which transmits the signal light; and a light-receiving element that includes, on a side toward the circuit board, a light-receiving portion that receives the signal light that has transmitted through the circuit board, where the signal light is reflected toward the light-receiving element at a boundary surface between the transmissive portion and the low refractive-index portion.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: August 12, 2014
    Assignee: Fujitsu Limited
    Inventor: Takashi Shiraishi
  • Patent number: 8803444
    Abstract: The invention provides a method and system of controlling illumination characteristics of a plurality of lighting segments. According to the invention, there is provided an illumination system, comprising: a plurality of lighting segments; a detecting subsystem configured to detect an illumination intensity and/or color of lights emitted from each lighting segment; a controller configured to receive the detecting subsystem's output signals representing illumination intensity and/or color of lights emitted from each lighting segment and to generate sets of driving signals to respectively adjust the driving currents of each lighting segment in response to the output signals, so as to adjust the illumination intensity and/or color of the lights emitted from each lighting segment in accordance with a predetermined illumination setting, wherein each set of driving signals has a unique period feature which is distinguished from that of other sets of driving signals corresponding to other lighting segments.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: August 12, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Ang Ding, Xiaoyan Zhu, Gongming Wei, Hugo Johan Cornelissen
  • Patent number: 8805128
    Abstract: A sensing device for detecting a physical parameter exemplified by pressures, strains, temperatures, indices of refraction, and combinations thereof. The sensing device comprises a probe having a housing for sealably mounting therein an optical fiber. The optical fiber is provided at its distal end with at least two spaced apart fiber Bragg gratings. The proximal end of the probe is engagable with a holder, and is in communication with fiber Bragg grating interrogation systems. Spacers and seals may be provided about the optical fiber between the fiber Bragg gratings. An orifice may be provided and sealed with a resilient membrane to provide a contained airspace around each fiber Bragg grating. The contained airspace may be optionally filled with a fluid or a gas.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: August 12, 2014
    Assignee: UVic Industry Partnerships Inc.
    Inventors: Peter Martin Wild, Christopher Raymond Dennison, David Andrew Singlehurst, Chris Bueley
  • Patent number: 8794809
    Abstract: A lighting system has one or more light guides capable of guiding light, each comprising a core and two optically smooth faces. A cavity adjacent to two of the optically smooth faces has an opening and a reflective-transmissive surface opposite the opening. A cover having a light source is proximate to and occludes the opening. A major portion of any light emitted from the light source is reflected by the reflective-transmissive surface of the cavity and is injected into the light guides, and a minor portion of any light emitted by the light source is transmitted through the reflective-transmissive surfaces of the cavity and emitted from the lighting system. A light injection coupler is also disclosed that has an optically transmissive housing and suitable for use to couple ends of at least one light guide thereby making a lighting system.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: August 5, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: David J. Lundin, David G. Freier, Kenneth A. Epstein, Scott D. Gullicks
  • Patent number: 8798412
    Abstract: Disclosed is an optical fiber having a core with an alkali metal oxide dopant in an peak amount greater than about 0.002 wt. % and less than about 0.1 wt. %. The alkali metal oxide concentration varies with a radius of the optical fiber. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained. Also disclosed are several methods of making the optical fiber including the steps of forming an alkali metal oxide-doped rod, and adding additional glass to form a draw perform. Preferably, the draw preform has a final outer dimension (d2), wherein an outer dimension (d1) of the rod is less than or equal to 0.06 times the final outer dimension (d2). In a preferred embodiment, the alkali metal oxide-doped rod is inserted into the centerline hole of a preform to form an assembly.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: August 5, 2014
    Assignee: Corning Incorporated
    Inventors: Dana C. Bookbinder, Lisa C. Chacon, Adam J. G. Ellison, Rostislav R. Khrapko, Stephan L. Logunov, Michael T. Murtagh, Sabyasachi Sen
  • Publication number: 20140212092
    Abstract: Embodiments of the invention describe systems, apparatuses and methods for providing athermicity and a tunable spectral response for optical filters. Finite impulse response (FIR) filters are commonly implemented in photonic integrated circuits (PICs) to make devices such as wavelength division multiplexing (WDM) devices, asymmetric Mach-Zehnder interferometers (AMZIs) and array waveguide gratings (AWGs). Athermicity of an FIR filter describes maintaining a consistent frequency transmission spectrum as the ambient temperature changes. A tunable spectral response for an FIR filter describes changing the spectrum of an FIR filter based on its application, as well as potentially correcting for fabrication deviations from the design. In addition, embodiments of the invention reduce energy dissipation requirements and control complexity compared to prior art solutions.
    Type: Application
    Filed: January 28, 2013
    Publication date: July 31, 2014
    Inventors: Jonathan Edgar Roth, Daniel Knight Sparacin, Gregory Alan Fish
  • Publication number: 20140211818
    Abstract: A cladding stripper includes a plurality of transversal notches or grooves in the outer surface of an exposed inner cladding of a double clad optical fiber. Position and orientation of the notches can be selected to even out cladding light release along the cladding light stripper, enabling more even temperature distributions due to released cladding light. The notches on the optical fiber can be made with a laser ablation system.
    Type: Application
    Filed: January 28, 2014
    Publication date: July 31, 2014
    Inventors: Kai-Chung HOU, Dahv Kliner, Martin H. Muendel, Jeremy Weston
  • Publication number: 20140211598
    Abstract: A light coupling structure, a method of manufacturing a memory cell, and a magnetic recording head are provided. The light coupling structure includes a light coupling layer having a cavity; a waveguide having a cladding layer and a core layer; wherein the cladding layer of the waveguide is disposed in the cavity of the light coupling layer and the core layer of the waveguide is disposed over the light coupling layer and the cladding layer of the waveguide; wherein the light coupling layer is configured to receive light from a light source and couple the received light into the core layer of the waveguide.
    Type: Application
    Filed: July 6, 2012
    Publication date: July 31, 2014
    Inventors: Qian Wang, Seng-Tiong Ho
  • Patent number: 8792754
    Abstract: A modalmetric fiber sensor comprising a multimode sensor fiber; a light source for launching light into the multimode sensor fiber to produce a multimode speckle pattern of light at an end of the multimode sensor fiber; a single mode fiber to receive light from the multimode speckle pattern; a detector connected to the single mode fiber to detect the received light from the speckle pattern; and a further multimode fiber disposed between the end of the sensor fiber and the single mode fiber such that the single mode fiber receives light from the speckle pattern by transmission through the further multimode fiber and the received light includes higher order modes regenerated in the further multimode fiber, wherein the further multimode fiber is overfilled with received light from the speckle pattern.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: July 29, 2014
    Assignee: Future Fibre Technologies Pty Ltd
    Inventors: Yuvaraja Visagathilagar, Jim Katsifolis, Bernhard Koziol
  • Publication number: 20140205234
    Abstract: Described herein are an apparatus, system, and method for providing a vertical optical coupler (VOC) for planar photonics circuits such as photonics circuits fabricated on silicon-on-insulator (SOI) wafers. In one embodiment, the VOC comprises a waveguide made from a material having refractive index in a range of 1.45 to 3.45, the waveguide comprising: a first end configured to reflect light nearly vertical by total internal reflection between the waveguide and another medium, a second end to receive the light for reflection, and a third end to output the reflected light. The VOC couples with a Si waveguide having a first region including: a first end to receive light; and an inverted tapered end in the direction of light propagation to output the received light, wherein the inverted tapered end of the Si waveguide is positioned inside the waveguide.
    Type: Application
    Filed: September 29, 2011
    Publication date: July 24, 2014
    Inventors: Haisheng Rong, Ofir Gan, Pradeep Sirnivasan, Assia Barkal, I-Wel Andy Hsieh, Mahesh Kirshamurthi, Yun-Chung Neil Na
  • Publication number: 20140205236
    Abstract: An optical fiber combiner 1 has: a plurality of input optical fibers 20; a plurality of divergence angle reducing members 50 which lights emitted from the respective input optical fibers 20 enter and which emits the lights from the input optical fibers 20 at divergence angles made lower than divergence angles upon entrance; a bridge fiber 30 which the lights emitted from the respective divergence angle reducing members 50 enter and which has a tapered portion 34 which has a portion in which the lights propagate and a diameter of which is gradually reduced apart from a divergence angle reducing member 50 side; and an output optical fiber 40 which a light emitted from a side of the bridge fiber 30 opposite to the divergence angle reducing member 50 side enters.
    Type: Application
    Filed: March 21, 2014
    Publication date: July 24, 2014
    Applicant: FUJIKURA LTD.
    Inventors: Yoshikiyo Noguchi, Kensuke Shima
  • Patent number: 8787714
    Abstract: Provided is a lens array that can reliably obtain monitor light and is easy to manufacture. In the provided lens array, light incident on a first lens surface (11) from light-emitting elements is split by a reflective/transmissive layer (17) between a first optical surface (14a) and a first prism surface (16a) and sent, respectively, towards a second lens surface (12) and a third lens surface (13). Monitor light included in the light sent towards the third lens surface (13) is sent by the third lens surface (13) towards a light-receiving element (8). The path of light incident on the first optical surface (14a) is collinear with the path of light outgoing from the second optical surface (14b).
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: July 22, 2014
    Assignee: Enplas Corporation
    Inventor: Shimpei Morioka
  • Patent number: 8787717
    Abstract: Systems and methods for coupling light into a transparent sheet. The systems include a light source and a light-diffusing optical fiber optically coupled to the light source. The light-diffusing optical fiber has a core, a cladding and a length, with at least a portion of the core comprising randomly arranged voids configured to provide substantially continuous light emission from the core and out of the cladding along at least a portion of the length, and into the transparent sheet.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: July 22, 2014
    Assignee: Corning Incorporated
    Inventor: Stephan Lvovich Logunov
  • Patent number: 8787716
    Abstract: A fiber coupler with an inner tube, an inner fiber arranged within the inner tube and several outer fibers arranged around the inner fiber, is disclosed, wherein said fiber coupler tapers in the longitudinal direction of the inner fiber from a main section to a terminal section and the inner cross section on the inner tube corresponds to the diameter of the inner fiber along the tapering section of the fiber coupler.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: July 22, 2014
    Assignees: TRUMPF Laser GmbH + Co. KG, JENOPTIK Laser GmbH
    Inventors: Malte Kumkar, Marcin Michal Kozak, Clemens Hoenninger, Andreas Liem, Thomas Gabler, Inka Manek-Hoenninger
  • Patent number: 8786930
    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: May 3, 2013
    Date of Patent: July 22, 2014
    Assignee: Ram Photonics, LLC
    Inventor: Ping Piu Kuo
  • Publication number: 20140193155
    Abstract: An optical resonator supports three resonance modes and having third-order optical nonlinearity. One or more waveguides are coupled to the three resonant modes. A waveguide input port is more strongly coupled to the first resonant mode than to the second and third resonant modes. A waveguide output port is more strongly coupled to at least one of the second and third resonant modes than to the first resonant mode. An optical filter has at least two optical resonators. The optical filter provides a passband having at least two poles and a transmission zero positioned outside the two poles. An optical demultiplexer includes first optical filter coupled in series with a second optical filter. Both optical filters provide a passband having at least two poles and a zero positioned outside the two poles. The zero of the first filter is located within the passband of the second filter.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 10, 2014
    Applicant: The Regents of the University of Colorado, a body corporate
    Inventors: Milos Popovic, Mark Taylor Wade, Xiaoge Zeng
  • Patent number: 8774578
    Abstract: An optical module includes a substrate including an optical device chip disposed on a top surface thereof, a spacer having at least one through hole and combined with the substrate on the substrate to insert the optical device chip into the through hole, a cover combined with the spacer on the spacer to stop the through hole, and an optical fiber combined with the cover on the cover in a position corresponding to a position of the optical device chip. The optical module is configured such that light transmitted through the optical fiber is incident to the optical device chip or light emitted from the optical device chip is incident to the optical fiber. The optical module may be downscaled and produced in large quantities at low cost.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: July 8, 2014
    Assignees: XL Photonics Inc.
    Inventor: Heung Ro Choo
  • Patent number: RE45214
    Abstract: A transceiver on a CMOS chip including optical and optoelectronic devices, and electronic circuitry may be operable to communicate optical signals between the CMOS chip and optical fibers coupled to the CMOS chip via a semiconductor laser and one or more photodetectors. The optical and optoelectronic devices may include waveguides, modulators, multiplexers, switches, and couplers. The photodetector may be integrated in the CMOS chip. The photodetector and the semiconductor laser may be mounted on the CMOS chip. The optical signals may be communicated out of and in to a top surface of the CMOS chip. A transceiver on a CMOS chip including optical and optoelectronic devices, and electronic circuitry, may be operable to communicate optical signals between the CMOS chip and optical fibers coupled to the CMOS chip via grating couplers. The optical signals may be communicated out of and in to a top surface of the CMOS chip.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: October 28, 2014
    Assignee: Luxtera, Inc.
    Inventors: Peter De Dobbelaere, Thierry Pinguet, Mark Peterson, Mark Harrison, Alexander G. Dickinson, Lawrence C. Gunn, III
  • Patent number: RE45215
    Abstract: A transceiver comprising a plurality of CMOS chips may be operable to communicate an optical source signal from a semiconductor laser into a first CMOS chip via optical couplers. The optical source signal may be used to generate first optical signals that are transmitted from the first CMOS chip to optical fibers coupled to the first CMOS chip via one or more optical couplers. Second optical signals may be received from the optical fibers and converted to electrical signals via photodetectors in the first CMOS chip. The optical source signal may be communicated from the semiconductor laser into the first CMOS chip via optical fibers in to a top surface and the first optical signals may be communicated out of a top surface of the first CMOS chip. The electrical signals may be communicated to at least a second of the plurality of CMOS chips comprising electronic devices.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: October 28, 2014
    Assignee: Luxtera, Inc.
    Inventors: Peter De Dobbelaere, Thierry Pinguet, Mark Peterson, Mark Harrison, Alexander G. Dickinson, Lawrence C. Gunn, III