公开(公告)号：US20180252983A1

公开(公告)日：2018-09-06

申请号：US15906204

申请日：2018-02-27

Applicant: Marcel W. Pruessner ,  William S. Rabinovich ,  Rita Mahon ,  Peter G. Goetz

Inventor： Marcel W. Pruessner ,  William S. Rabinovich ,  Rita Mahon ,  Peter G. Goetz

IPC: G02F1/29 ,  G02B6/28 ,  G02B6/124

CPC classification number: G02F1/292 ,  G01S7/4813 ,  G01S7/4817 ,  G02B6/124 ,  G02B6/2804 ,  G02B6/2813 ,  G02B6/2821 ,  G02F2201/06

Abstract: A device includes a waveguide grating out-coupler, and a tunable uniform phase shifter communicating with the waveguide grating out-coupler. The tunable uniform phase shifter steers a flat phase front along a first angle in a first plane. Optionally, the waveguide grating out-coupler includes a modulated refractive index and a physical grating period. The tunable uniform phase shifter controls the refractive index, thereby controlling an effective grating period. The grating period relates to the modulated refractive index, and the physical grating period. Optionally, the tunable uniform phase shifter includes a first thermo-optic phase shifter, a first electro-optic phase shifter, or a first micro-electro-mechanical system index perturbation phase shifter. Optionally, the tunable linear gradient phase shifter communicates with the waveguide grating out-coupler and steers a beam along the flat phase front along a second angle in a second plane, which is perpendicular to the first plane.

公开(公告)号：US09971227B2

公开(公告)日：2018-05-15

申请号：US15620801

申请日：2017-06-12

Applicant: Zhengbiao Ouyang

Inventor： Zhengbiao Ouyang ,  Guohua Wen

IPC: G02F1/313

CPC classification number: G02F1/3133 ,  G02B6/122 ,  G02B6/1225 ,  G02B2006/12145 ,  G02F2201/06 ,  G02F2202/32 ,  G02F2203/07

Abstract: The present invention discloses a TMOS based on slab PhCs with a high DOP and a large EXR, which comprises an upper slab PhC and a lower slab PhC; the upper slab PhC is called as a first square-lattice slab PhC with a TE bandgap, the unit cell of the first square-lattice slab PhC includes a high-refractive-index rotating-square pillar, a single first flat dielectric pillar and a background dielectric, the first flat dielectric pillar includes a high-refractive-index dielectric pipe and a low-refractive-index dielectric, or a high-refractive-index flat film, or a low-refractive-index dielectric; the lower slab PhC is a second square-lattice slab PhC with a complete bandgap, wherein the unit cell of the second square-lattice slab PhC includes a high-refractive-index rotating-square pillar, a single second flat dielectric pillar and a background dielectric, and a normalized operating frequency of the TMOS with high DOP and large extinction ratio is 0.252 to 0.267.

公开(公告)号：US20180081205A1

公开(公告)日：2018-03-22

申请号：US15379165

申请日：2016-12-14

Applicant: Honeywell International Inc.

Inventor： Matthew Wade Puckett

IPC: G02F1/125 ,  G01C19/72

CPC classification number: G02F1/125 ,  G01C19/722 ,  G01C19/727 ,  G01K2011/322 ,  G01N29/00 ,  G02B6/122 ,  G02F2201/06

Abstract: An acousto-optic waveguide comprises a cladding region comprising a first material having a first refractive index and a first acoustic velocity, and a pair of optical waveguide layers embedded in and extending through the cladding region. The optical waveguide layers are separated from one another by a gap region comprising the first material. The optical waveguide layers each comprise a second material having a second refractive index that is higher than the first refractive index and a second acoustic velocity that is higher than the first acoustic velocity. The optical waveguide layers substantially confine acoustic waves that are generated during optical signal propagation through the acousto-optic waveguide. The acoustic waves are substantially confined to the area around the optical waveguide layers and the gap region along the direction of the optical signal propagation.

公开(公告)号：US20180039153A1

公开(公告)日：2018-02-08

申请号：US15667469

申请日：2017-08-02

Applicant: University of Southern California

Inventor： Hossein Hashemi ,  SungWon Chung ,  Hooman Abediasl

IPC: G02F1/295 ,  G02F1/29

CPC classification number: G02F1/2955 ,  G02F1/292 ,  G02F2201/06 ,  G02F2203/50

Abstract: An optical device includes an array of unit optical elements. Each of the unit optical elements includes a plurality of amplitude adjustment (AA) elements, each of the plurality of AA elements configured for processing one of different phases of an optical signal; an optical antenna, and a combining mechanism for optically coupling the plurality of AA elements to the optical antenna. The optical device also includes a controller coupled to the plurality of AA elements, the controller configured for generating control signals for the plurality of AA elements according to a target optical beam pattern.

公开(公告)号：US20170370723A1

公开(公告)日：2017-12-28

申请号：US15633795

申请日：2017-06-27

Applicant: The Charles Stark Draper Laboratory, Inc.

Inventor： Gilbert D. Feke

IPC: G01C19/72 ,  G02F1/035 ,  G02F1/225 ,  G02F1/21

CPC classification number: G01C19/722 ,  G02F1/035 ,  G02F1/225 ,  G02F2001/211 ,  G02F2201/06 ,  G02F2202/20

Abstract: A Y-branch dual electro-optical phase modulator (YBDPM) has a stitched-in zinc oxide diffused waveguide. It is more vacuum stable and has higher resistance to photorefractive damage than currently used Ti-diffused waveguides. The YBDPM is useful in Fiber Optic Gyroscopes (FOG), especially in low frequencies applications.

公开(公告)号：US20170351157A1

公开(公告)日：2017-12-07

申请号：US15626218

申请日：2017-06-19

Applicant: Zhengbiao Ouyang

Inventor： Zhengbiao Ouyang ,  Quanqiang Yu

IPC: G02F3/00 ,  G02B6/122 ,  G02B6/125 ,  G02F1/365

CPC classification number: G02F3/00 ,  G02B6/1223 ,  G02B6/1225 ,  G02B6/125 ,  G02F1/3501 ,  G02F1/3511 ,  G02F1/365 ,  G02F2201/06 ,  G02F2202/32

Abstract: The present invention discloses an high-contrast photonic crystal “OR”, “NOT” and “XOR” logic gate, comprising a six-port two-dimensional photonic crystal, a nonlinear cavity unit and a cross-waveguide logic gate unit; the high-contrast photonic crystal “OR” logic gate includes a first reference-light input port, two first idle ports, two first signal-input ports and a first signal-output port; the high-contrast photonic crystal “NOT” logic gate includes two second reference-light input ports, two second idle ports, a second signal-input port and a second signal-output port; and the high-contrast photonic crystal “XOR” logic gate includes a three reference-light input port, two three-idle ports, two three-signal input ports and a three-signal output port; the cross-waveguide logic gate unit is arranged with different input or output ports; and the nonlinear cavity unit is coupled with the cross-waveguide logic gate unit. The structure of the present invention is easy to integrate with other optical logic elements.

公开(公告)号：US09829766B2

公开(公告)日：2017-11-28

申请号：US15428432

申请日：2017-02-09

Applicant: Analog Devices, Inc.

Inventor： Michael H. Anderson ,  Scott R. Davis ,  Scott D. Rommel

IPC: G02F1/295 ,  G02F1/29

CPC classification number: G02F1/295 ,  G02F1/1326 ,  G02F1/29 ,  G02F1/2955 ,  G02F2001/291 ,  G02F2201/06 ,  G02F2201/12 ,  G02F2201/122

Abstract: A substantially planar waveguide for dynamically controlling the out-of-plane angle at which a light beam exits the waveguide. Generally, liquid crystal materials may be disposed within a waveguide in a cladding proximate or adjacent to a core layer of the waveguide. In one example, the waveguide may contain one or more taper regions such that the light beam exits the waveguide and propagates out-of-the-plane of the waveguide into an out-coupling medium at a propagation angle. In one example, the waveguide may contain one or more electrodes onto which one or more voltages may be applied. The magnitude of the propagation angle may be electronically controlled by stored by controlling or altering the magnitude of the one or more applied voltages.

公开(公告)号：US20170277014A1

公开(公告)日：2017-09-28

申请号：US15620809

申请日：2017-06-12

Applicant: ZHENGBIAO OUYANG

Inventor： ZHENGBIAO OUYANG ,  GUOHUA WEN

IPC: G02F1/313

CPC classification number: G02F1/3133 ,  G02B6/122 ,  G02B26/00 ,  G02F2201/06 ,  G02F2202/32 ,  G02F2203/07

Abstract: The present invention discloses a TEOS based on slab PhCs with a high DOP and large EXR, which comprises an upper slab PhC and a lower slab PhC; the upper slab PhC is a first square-lattice slab PhC with a TM bandgap and a complete bandgap, wherein the unit cell of the first square-lattice slab PhC includes a high-refractive-index rotating-square pillar, a single first flat dielectric pillar and a background dielectric, the first flat dielectric pillar includes a high-refractive-index dielectric pipe and a low-refractive-index dielectric, or a high-refractive-index flat film, or a low-refractive-index dielectric; the lower slab PhC is a second square lattice slab PhC with a TM bandgap and complete bandgap, wherein the unit cell of the second square-lattice slab PhC includes a high-refractive-index rotating-square pillar, a single second flat dielectric pillar and a background dielectric, and an normalized operating frequency of the TEOS is 0.453 to 0.458.

公开(公告)号：US09733499B1

公开(公告)日：2017-08-15

申请号：US15434469

申请日：2017-02-16

Applicant: Commissariat A L'Energie Atomique et aux Energies Alternatives

Inventor： Badhise Ben Bakir ,  Karim Hassan

IPC: G02B6/12 ,  G02F1/025 ,  G02F1/01 ,  G02B6/122 ,  G02F1/015

CPC classification number: G02F1/025 ,  G02B6/12 ,  G02B6/1228 ,  G02F1/0147 ,  G02F1/365 ,  G02F2001/0156 ,  G02F2201/06 ,  G02F2203/07

Abstract: This slow light waveguide includes an initial region which extends, along an optical axis, from a start starting from which the width of a central waveguide begins to continuously decrease up to an end beyond which the width of the central waveguide no longer decreases up to the end of a slowing section, this initial region overlapping a broadening region where the length of lateral teeth continuously increases, a final region which extends, along the optical axis, from a start starting from which the width of the central waveguide begins to continuously increase up to an end beyond which the width of the central waveguide no longer increases, this final region overlapping a narrowing region where the length of the lateral teeth continuously decreases.

公开(公告)号：US20170155451A1

公开(公告)日：2017-06-01

申请号：US15430772

申请日：2017-02-13

Applicant: FUJITSU LIMITED

Inventor： Akinori Hayakawa

IPC: H04B10/516 ,  G02F1/01 ,  H04B10/50 ,  G02F1/025

CPC classification number: H04B10/516 ,  G02F1/0121 ,  G02F1/0123 ,  G02F1/0147 ,  G02F1/025 ,  G02F1/2257 ,  G02F2001/0152 ,  G02F2201/06 ,  G02F2201/12 ,  G02F2203/05 ,  H04B10/501 ,  H04B10/572

Abstract: An optical modulation apparatus includes an optical modulation unit that includes a plurality of ring optical modulators which are coupled in cascade to each other and the ring optical waveguides of which have round-trip lengths different from each other, and a controller that performs, for at least one of the ring optical modulators, first resonance wavelength adjustment control to adjust the resonance wavelength of the ring optical modulator to one input light wavelength, performs second resonance wavelength adjustment control to specify the ring optical modulator that exhibits a minimum current amount required for the adjustment of the resonance wavelength of the ring optical waveguide to the one input light wavelength from among the ring optical modulators and adjust the resonance wavelength of the specified ring optical modulator to the one input light wavelength, and performs modulation driving control for the specified ring optical modulator.