公开(公告)号：US20250055255A1

公开(公告)日：2025-02-13

申请号：US18722460

申请日：2022-12-21

Applicant: Munster Technological University (MTU)

Inventor： Ganga Chinna Rao Devarapu ,  William Whelan-Curtin ,  Frank SMYTH

IPC: H01S5/14 ,  G02F1/35 ,  G02F1/365 ,  G02F1/39 ,  H01S5/026 ,  H01S5/11 ,  H01S5/50

Abstract: The invention provides a frequency comb laser device comprising a laser cavity having an optical gain material for coupling light to a waveguide comprising a dispersive material; a reflector at the end of the optical gain material and a resonant mirror at the other; where the resonant mirror comprises an on-chip waveguide coupled to a fabry perot cavity formed by one or more photonic crystal reflectors, such that lasing operation is sustained with the laser cavity. The invention makes it possible to improve the control of the dispersion of a frequency comb source through the use of a PhC structure of the present invention in combination with or without other dispersion control mechanisms.

公开(公告)号：US20250044426A1

公开(公告)日：2025-02-06

申请号：US18791257

申请日：2024-07-31

Applicant: Scantinel Photonics GmbH

Inventor： Stanislav Aksarin

IPC: G01S7/4911 ,  G01S7/481 ,  G01S17/32 ,  G01S17/931 ,  H01S5/062 ,  H01S5/14

Abstract: A tunable light source for a frequency-modulated continuous wave (FMCW) LiDAR device includes an external cavity laser including a laser gain medium having a light output facet emitting laser light, a reflector and an external cavity waveguide extending between the light output facet and the reflector. A variable phase shifter is arranged in the external cavity waveguide. An optical splitter splits off a portion of the laser light and has an output port. An optical phase-locked loop is optically coupled to the optical splitter and electrically coupled to the laser gain medium. The optical phase-locked loop includes a first arm and a second arm, a double stage single-sideband Weaver mixer including an optical stage and an electrical stage, a phase detector and a loop filter that are electrically connected in series. The first arm and the second arm have different optical path lengths.

公开(公告)号：US20250023328A1

公开(公告)日：2025-01-16

申请号：US18770130

申请日：2024-07-11

Applicant: Stichting IMEC Nederland

Inventor： Ruud Oldenbeuving

IPC: H01S5/14 ,  H01S3/10 ,  H01S5/10

Abstract: Examples include a tunable laser, in particular, an external cavity type laser. Examples also include a method of operating the tunable laser. The tunable laser is designed for fast and repeatable wavelength tuning over a wide wavelength range. The tunable laser includes a cavity and a gain medium arranged in the cavity. The gain medium is configured to generate light by stimulated emission and to emit the light into the cavity. The tunable laser also includes a laser output configured to output a portion of the light in the cavity as a laser beam. The cavity includes a first resonator and a second resonator that are optically coupled to each other. A resonance frequency of the first resonator is tunable. A free spectral range (FSR) of the second resonator is an integer multiple of an FSR of the cavity.

公开(公告)号：US12199405B2

公开(公告)日：2025-01-14

申请号：US15237635

申请日：2016-08-16

Applicant: Infinera Corporation

Inventor： Peter W. Evans ,  Fred A. Kish, Jr. ,  Vikrant Lal ,  Scott Corzine ,  Mingzhi Lu

IPC: H01S5/00 ,  H01S5/026 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/068 ,  H01S5/10 ,  H01S5/14 ,  H01S5/20 ,  G02B6/12 ,  G02F1/21 ,  G02F1/225 ,  H01S3/107 ,  H01S5/22 ,  H01S5/30 ,  H01S5/40 ,  H04B10/572

Abstract: Consistent with the present disclosure, a compact laser with extended tunability (CLET) is provided that includes multiple segments or sections, at least one of which is curved, bent or non-collinear with other segments, so that the CLET has a compact form factor either as a singular laser or when integrated with other devices. The term CLET, as used herein, refers to any of the laser configurations disclosed herein having mirrors and a bent, angled or curved part, portion or section between such mirrors. If bent, the bent portion is preferably oriented at an angle of at least 30 degrees relative to other portions of the CLET. Alternatively, the curve or bend portion may be distributed over different sections of the CLET over a series of arcs, for example. The waveguide extending between the mirrors is continuous, such that light propagating along the waveguide is not divided or split. The waveguide also constitutes a continuous waveguide path.

公开(公告)号：US12197003B2

公开(公告)日：2025-01-14

申请号：US17942612

申请日：2022-09-12

Applicant: Sumitomo Electric Industries, Ltd. ,  National University Corporation Hokkaido University

Inventor： Takuo Hiratani ,  Naoki Fujiwara ,  Kunimasa Saitoh ,  Takeshi Fujisawa ,  Takanori Sato

IPC: G02B6/12 ,  G02B5/20 ,  H01S5/02 ,  H01S5/026 ,  H01S5/14 ,  G02B5/26 ,  G02B6/293 ,  H01S5/042 ,  H01S5/22

Abstract: An optical filter includes a first loop mirror, a second loop mirror, a first waveguide optically coupled to the first loop mirror and the second loop mirror, a second waveguide optically coupled to the first loop mirror and the second loop mirror, a first access waveguide optically coupled to the first waveguide, a second access waveguide optically coupled to the second waveguide, and an output section, wherein the first loop mirror includes a first loop waveguide and a first multiplexer/demultiplexer, the second loop mirror includes a second loop waveguide and a second multiplexer/demultiplexer, the output section includes a third loop waveguide, a third multiplexer/demultiplexer, a third waveguide, and a fourth waveguide, the third loop waveguide optically coupled to the second loop waveguide and the third multiplexer/demultiplexer, the third waveguide and the fourth waveguide optically coupled to the third multiplexer/demultiplexer, and the output section.

公开(公告)号：US12184039B2

公开(公告)日：2024-12-31

申请号：US18310205

申请日：2023-05-01

Applicant: Nuburu, Inc.

Inventor： Mark Zediker ,  Jean Philippe Feve ,  Matthew Silva Sa ,  Michael Jansen

IPC: H01S5/40 ,  G02B26/00 ,  H01S3/094 ,  H01S3/0941 ,  H01S5/02251 ,  H01S5/02253 ,  H01S5/023 ,  H01S5/02326 ,  H01S5/0233 ,  H01S5/024 ,  H01S5/028 ,  H01S5/30 ,  H01S5/00 ,  H01S5/0235 ,  H01S5/068 ,  H01S5/12 ,  H01S5/14 ,  H01S5/323

Abstract: The invention may be embodied in other forms than those specifically disclosed herein without departing from itMulti-kW-class blue (400-495 nm) fiber-delivered lasers and module configurations. In embodiments, the lasers propagate laser beams having beam parameter products of

公开(公告)号：US20240405516A1

公开(公告)日：2024-12-05

申请号：US18642919

申请日：2024-04-23

Applicant: NEC Corporation

Inventor： Morio Takahashi

IPC: H01S5/50 ,  H01S5/026 ,  H01S5/10 ,  H01S5/14

Abstract: A semiconductor optical amplification element including: a first optical amplification waveguide that amplifies light by using a semiconductor; a second optical amplification waveguide that amplifies light by using the semiconductor; and a loop waveguide reflector that reflects light by using a loop of a waveguide, wherein one end of the first optical amplification waveguide is connected to the loop waveguide reflector, another end of the first optical amplification waveguide and another end of the second optical amplification waveguide are formed with a coplanar anti-reflection termination surface, and one end of the second optical amplification waveguide is formed with an anti-reflection termination surface.

公开(公告)号：US20240388057A1

公开(公告)日：2024-11-21

申请号：US18659382

申请日：2024-05-09

Applicant: NEC Corporation

Inventor： Naoki KOBAYASHI

IPC: H01S5/0236 ,  H01S5/14

Abstract: To provide a wavelength variable laser apparatus in which wet-spreading of an adhesive is suppressed when a semiconductor gain chip is mounted on a photonics element with an adhesive. A wavelength variable laser apparatus includes a semiconductor gain chip, a carrier on which the semiconductor gain chip is mounted, and a photonics element adhered to an end surface of the carrier with an adhesive. A lower end part in a longitudinal direction of the semiconductor gain chip is disposed in such a way as to face an upper end part in a longitudinal direction of the photonics element. Discontinuous shapes are formed on an area above a part of the end surface of the carrier to which the adhesive is applied.

公开(公告)号：US12100934B2

公开(公告)日：2024-09-24

申请号：US18085643

申请日：2022-12-21

Applicant: University of Maryland, College Park

Inventor： Mario Dagenais ,  Yang Zhang

IPC: H01S5/00 ,  H01S5/02326 ,  H01S5/0237 ,  H01S5/06 ,  H01S5/10 ,  H01S5/14

CPC classification number: H01S5/141 ,  H01S5/02326 ,  H01S5/0237 ,  H01S5/0612 ,  H01S5/1032

Abstract: A laser system for generating a narrow linewidth semiconductor light beam includes a substrate, a gain chip affixed on the substrate and configured to amplify light beam, and an optical feedback photonic chip affixed on the substrate, optically coupled to the gain chip, and configured to output light beam, which has a narrow linewidth around a resonant frequency of the optical feedback photonic chip, to the gain chip.

公开(公告)号：US12100926B2

公开(公告)日：2024-09-24

申请号：US17243656

申请日：2021-04-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yuanbing Cheng ,  Heng Wang ,  Jing Dai ,  Yinghua Dong

IPC: H01S3/10 ,  G02B6/12 ,  H01S5/14 ,  H04B10/69

CPC classification number: H01S3/10023 ,  G02B6/12009 ,  H01S5/141 ,  H04B10/691

Abstract: An embodiment of the present invention provides a photodetector chip, including a substrate, a semiconductor optical amplification section, and a photodetection section. The substrate includes a surface, the photodetection section and the semiconductor optical amplification section are arranged on the substrate, and the photodetection section is located in an optical signal output direction of the semiconductor optical amplification section. The semiconductor optical amplification section amplifies and filters an input optical signal to output an amplified and filtered optical signal to the photodetection section. The photodetection section is configured to convert the amplified and filtered optical signal into an electrical signal. The semiconductor optical amplification section includes a grating, the grating includes a first grating and a second grating that are cascaded, and the first grating is a slanted grating. The first grating and the second grating are configured to filter an optical signal entering the semiconductor optical amplification section.