公开(公告)号：US20240168323A1

公开(公告)日：2024-05-23

申请号：US18424487

申请日：2024-01-26

Applicant: KYOCERA Corporation

Inventor： Hiromichi YOSHIKAWA ,  Naoki MATSUI ,  Tomoya SUGITA

IPC: G02F1/095 ,  H04B10/50

CPC classification number: G02F1/0955 ,  H04B10/50 ,  H04B10/501

Abstract: An isolator comprises a substrate having a substrate surface; and first and second waveguides that are positioned at least partially side by side along the substrate surface. The first waveguide includes a first core, the second waveguide includes a second core, and the first and second cores are surrounded by a dielectric. The first waveguide includes first and second ends, and includes a port through which an electromagnetic wave is input and output at each of the first and second ends. The second waveguide includes a first portion extending along the first waveguide and a second portion that is not included in the first portion. The second waveguide includes a nonreciprocal member that is in contact with at least a part of the second core of the first portion, and the nonreciprocal member is in contact with at least a part of the second core of the second portion.

公开(公告)号：US11982888B2

公开(公告)日：2024-05-14

申请号：US17804261

申请日：2022-05-26

Applicant: KYOCERA Corporation

Inventor： Reona Motoji ,  Tomoya Sugita

IPC: G02F1/095 ,  G02B6/12 ,  G02B6/27 ,  G02F1/09

CPC classification number: G02F1/0955 ,  G02B6/2746 ,  G02F1/093 ,  G02B2006/12157

Abstract: A nonreciprocal waveguide includes a substrate, a light propagation path, a magnetic member, an insulating layer, and a mask. The light propagation path is positioned at the substrate along a substrate surface. The magnetic member is positioned at the substrate along part of the light propagation path in a longitudinal direction. The insulating layer is positioned at the substrate and contains the light propagation path and the magnetic member. Inside the insulating layer, the mask is positioned further away than the light propagation path from the substrate. As seen from a direction perpendicular to the substrate surface, the mask overlaps at least part of the light propagation path in a width direction from a side of the light propagation path opposite to the magnetic member in the width direction. The mask is positioned in at least a range in which the magnetic member is positioned in the longitudinal direction.

公开(公告)号：US20240094569A1

公开(公告)日：2024-03-21

申请号：US18254177

申请日：2021-11-12

Applicant: SHENZHEN INNOWAVE TECHNOLOGY CO., LTD.

Inventor： GUOQIANG CHEN

IPC: G02F1/095

CPC classification number: G02F1/0955

Abstract: An optical isolator core includes: a first birefringent crystal, a Faraday rotator, a second birefringent crystal, and a third birefringent crystal that are successively arranged along a forward optical path. In response to forward o light and forward e light successively traveling through the aforementioned optical elements, displacements of exit points of the forward o light and the forward e light with respect to an incident point are the same, and the forward o light and the forward e light are merged as exiting forward light. In response to backward o light and backward e light successively reversely traveling through the aforementioned optical element, displacements of exit points of the backward o light and the backward e light with respect to the incident point of the forward light causes the backward o light and the backward e light to deviate from the forward optical path.

公开(公告)号：US11921365B2

公开(公告)日：2024-03-05

申请号：US17597806

申请日：2020-07-20

Applicant: KYOCERA Corporation

Inventor： Hiromichi Yoshikawa ,  Naoki Matsui ,  Tomoya Sugita

IPC: G02F1/095 ,  H04B10/50

CPC classification number: G02F1/0955 ,  H04B10/50 ,  H04B10/501

Abstract: An isolator includes a first core, a second core, a nonreciprocal member, and a magnetic body. The first core and the second core extend in a first direction and are positioned side by side with a cladding therebetween in a second direction that intersects the first direction. The nonreciprocal member is in contact with at least a part of the second core while being positioned side by side with the second core in the second direction. In a magnetic field generated by the magnetic body in a portion where the nonreciprocal member is positioned, a component in a third direction perpendicular to the first direction and the second direction is greater than any component other than the component in the third direction.

公开(公告)号：US11886058B2

公开(公告)日：2024-01-30

申请号：US17595702

申请日：2020-05-22

Applicant: ROCKLEY PHOTONICS LIMITED

Inventor： Adam Scofield ,  Gerald Byrd ,  Aaron John Zilkie

IPC: G02F1/09 ,  G02F1/095 ,  G02F1/01

CPC classification number: G02F1/0955 ,  G02F1/0136

Abstract: An optical isolator on a silicon photonic integrated circuit. The optical isolator comprising: a polarization splitter; a polarization rotator; and a Faraday rotator. The Faraday rotator comprises: one or more magnets providing a magnetic field; and a silicon spiral delay line. The silicon spiral delay line being formed from a silicon waveguide shaped into a spiral region having no built-in phase shifters and a central region within the spiral region. The central region having no more than a total of 180 degree of phase shifters.

公开(公告)号：US11754644B2

公开(公告)日：2023-09-12

申请号：US16879575

申请日：2020-05-20

Applicant: University of Southampton

Inventor： Rand Ismaeel ,  Ali Masoudi ,  Martynas Beresna ,  Gilberto Brambilla

IPC: G01R33/032 ,  G02F1/00 ,  G02F1/01 ,  G02F1/09 ,  G02F1/095

CPC classification number: G01R33/0322 ,  G02F1/0036 ,  G02F1/0136 ,  G02F1/093 ,  G02F1/0955 ,  G02F2202/06

Abstract: A magnetic field sensor comprises a magnetically responsive light propagating component configured to cause a polarization of light propagating inside the component to be rotated in response to an applied magnetic field, wherein the magnetically responsive light propagating component is formed of a bulk material doped with a dopant, the dopant including at least gadolinium, the dopant concentration being at a sufficiently low concentration such that the dopant is uniformly dispersed in the bulk material to provide a high Verdet constant. The magnetic field sensor also comprises a detector, and a polarization-maintaining light input device to couple the light into the magnetically responsive light propagating component. The detector is configured to measure a property of light output from the magnetically responsive light propagating component to determine a change in polarization of the light, the change caused by the presence of a magnetic field.

公开(公告)号：US20230185120A1

公开(公告)日：2023-06-15

申请号：US18105665

申请日：2023-02-03

Applicant: Syght, Inc.

Inventor： Charles C. Partee ,  Kevin D. McKinstry

IPC: G02F1/09 ,  G02F1/095 ,  H04N9/31

CPC classification number: G02F1/09 ,  G02F1/095 ,  G02F1/092 ,  H04N9/3167 ,  G02F2203/07 ,  G02F2203/12 ,  G02B3/0056

Abstract: An optoelectronic system includes a concentration layer, a modulation layer including an array of light modulators, an exit layer that receives the modulation layer output having a modulation layer output spatial distribution and remaps the modulation layer output spatial distribution to a modified spatial distribution. A collector layer receives the modified spatial distribution to produce a collector layer output. A detector receives the collector layer output. A processor controls the modulation layer and receives the detector output to generate an image. The collector layer can receive the modified spatial distribution at a plurality of collector layer inputs and combine the plurality of collector layer inputs at a collector layer output. Modulators can be configured to direct couple modulated light to a collector layer, without using an exit layer. Configurations with spatial light modulator modules and sub-modules are described.

公开(公告)号：US11644544B2

公开(公告)日：2023-05-09

申请号：US16814726

申请日：2020-03-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Raymond Sarkissian ,  Keyvan Sayyah ,  Shuoqin Wang ,  Biqin Huang ,  Ivan Alvarado

IPC: G01S7/48 ,  G01S7/481 ,  G01S7/4911 ,  G01S7/4912 ,  G01S17/88 ,  G02B6/12 ,  G02B6/122 ,  G01S17/10 ,  G02F1/095 ,  B60R11/00 ,  G02F1/01

CPC classification number: G01S7/4818 ,  G01S7/4813 ,  G01S7/4814 ,  G01S7/4815 ,  G01S7/4816 ,  G01S7/4817 ,  G01S7/4911 ,  G01S7/4916 ,  G01S17/10 ,  G01S17/88 ,  G02B6/12004 ,  G02B6/1228 ,  G02F1/0955 ,  B60R11/00 ,  G02B2006/1215 ,  G02B2006/12061 ,  G02B2006/12097 ,  G02B2006/12121 ,  G02B2006/12147 ,  G02F1/0147

Abstract: An architecture for a chip-scale optical phased array-based scanning frequency-modulated continuous wave (FMCW) Light-detection and ranging (LiDAR) device is described. The LiDAR device includes a laser, a transmit optical splitter, an optical circulator, photodetectors, and an optical phased array. The laser, the transmit optical splitter, the optical circulator, the photodetectors, and the optical phased array are arranged as a chip-scale package on a single semiconductor substrate. The laser generates a first light beam that is transmitted to the optical phased array aperture via the transmit optical splitter, the optical circulator, and the optical phased array. A fraction of the first light beam is transmitted to the photodetectors via the transmit optical splitter to serve as the optical local oscillator (LO), the aperture of the optical phased array captures a second light beam that is transmitted to the photodetectors via the optical phased array and the optical circulator.

公开(公告)号：US20220214568A1

公开(公告)日：2022-07-07

申请号：US17605202

申请日：2020-04-22

Applicant: Regents of the University of Minnesota

Inventor： Karthik Srinivasan ,  Bethanie Joyce Hills Stadler

IPC: G02F1/095 ,  G02B6/122 ,  G02B6/42

Abstract: A method of fabricating a gyrotropic device (e.g., an optical isolator) includes: providing a substrate comprising a waveguide layer and forming an optical isolator active layer on the waveguide layer of the substrate. Forming the optical isolator active layer includes, for a specified composition of the optical isolator active layer, deriving at least one sputtering process parameter, performing sputtering of a plurality of targets according to the at least one sputtering process parameter to deposit the optical isolator active layer on the waveguide layer of the substrate, measuring an initial value of a bias voltage at a first target of the plurality of targets; and throughout deposition of the optical isolator active layer, maintaining the bias voltage at the initial value to within a predetermined threshold of the initial value.

公开(公告)号：US11378829B2

公开(公告)日：2022-07-05

申请号：US16936319

申请日：2020-07-22

Applicant: Syght, Inc.

Inventor： Charles C. Partee ,  Kevin D. McKinstry ,  Michael G. Machado

IPC: G02F1/09 ,  G02F1/095 ,  H04N9/31 ,  G02B3/00 ,  G02F1/03 ,  G02F1/035 ,  H04N5/225

Abstract: A spatial light modulator system includes a concentration layer including an array of optical concentrators, such that each concentrator concentrates a portion of an input light beam. A modulation layer includes an array of light modulators each in optical communication with one of the optical concentrators for modulating the portion of the input light beam. The light modulators are spaced apart from one another in the modulation layer to form gaps between adjacent ones of the light modulators. A coil of each light modulator can surround a Faraday element or core containing a Faraday material to control a magnetic state of a Faraday material responsive to control signals.