公开(公告)号：US20240332899A1

公开(公告)日：2024-10-03

申请号：US18191966

申请日：2023-03-29

Applicant: KING FAISAL UNIVERSITY

Inventor： Hesham M. ENSHASY

IPC: H01S5/14 ,  H01S5/0625 ,  H01S5/10 ,  H01S5/34

CPC classification number: H01S5/142 ,  H01S5/06255 ,  H01S5/1082 ,  H01S5/34

Abstract: A continuously electronically tunable semiconductor laser has a lasing section, and first and second control sections separated from the lasing section by air gaps in a longitudinal arrangement. The longitudinal arrangement positions the lasing section between the two control sections, with the longitudinal arrangement corresponding to a lasing direction of the lasing section. The arrangement places longitudinal modes of the semiconductor laser in common with the longitudinal arrangement of the sections. Current is provided to each of the first and second control sections and the lasing section. Tuning is achieved by varying the current provided to at least one of the first control section, the second control section and the lasing section.

公开(公告)号：US20240305058A1

公开(公告)日：2024-09-12

申请号：US18663971

申请日：2024-05-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dongjae SHIN ,  Hyunil BYUN ,  Changgyun SHIN

IPC: H01S3/10 ,  G01S7/481 ,  H01S3/063 ,  H01S3/08031 ,  H01S3/082 ,  H01S3/083 ,  H01S3/106 ,  H01S5/00 ,  H01S5/02 ,  H01S5/06 ,  H01S5/065 ,  H01S5/10 ,  H01S5/14

CPC classification number: H01S3/10023 ,  H01S3/0637 ,  H01S5/0071 ,  H01S5/0612 ,  H01S5/0654 ,  H01S5/1071 ,  H01S5/142 ,  G01S7/4814 ,  G01S7/4817 ,  H01S3/08031 ,  H01S3/082 ,  H01S3/0826 ,  H01S3/083 ,  H01S3/106 ,  H01S5/021 ,  H01S5/0218

Abstract: Provided is a tunable laser source including a plurality of optical waveguides, at least three optical resonators provided between the plurality of optical waveguides and optically coupled to the plurality of optical waveguides, the at least three optical resonators having different lengths, and at least one optical amplifier provided on at least one of the plurality of optical waveguides, wherein a ratio of a first length of a first optical resonator of the at least three optical resonators to a second length of a second optical resonator of the at least three optical resonators is not an integer.

公开(公告)号：US11929592B2

公开(公告)日：2024-03-12

申请号：US17024473

申请日：2020-09-17

Applicant: MARVELL ASIA PTE LTD.

Inventor： Xiaoguang He ,  Radhakrishnan L. Nagarajan

IPC: H01S5/30 ,  H01S5/02 ,  H01S5/026 ,  H01S5/028 ,  H01S5/068 ,  H01S5/10 ,  H01S5/14 ,  H01S5/50

CPC classification number: H01S5/309 ,  H01S5/026 ,  H01S5/028 ,  H01S5/0287 ,  H01S5/068 ,  H01S5/142 ,  H01S5/50 ,  H01S5/021 ,  H01S5/0218 ,  H01S5/101 ,  H01S5/1039 ,  H01S5/1085

Abstract: A semiconductor optical amplifier for high-power operation includes a gain medium having a multilayer structure sequentially laid with a P-layer, an active layer, a N-layer from an upper portion to a lower portion in cross-section thereof. The gain medium is extendedly laid with a length L from a front facet to a back facet. The active layer includes multiple well layers formed by undoped semiconductor material and multiple barrier layers formed by n-doped semiconductor materials. Each well layer is sandwiched by a pair of barrier layers. The front facet is characterized by a first reflectance Rf and the back facet is characterized by a second reflectance Rb. The gain medium has a mirror loss αm about 40-200 cm−1 given by: αm=(½L)ln{1/(Rf×Rb)}.

公开(公告)号：US11855416B2

公开(公告)日：2023-12-26

申请号：US17243326

申请日：2021-04-28

Applicant: Gideon Yoffe

Inventor： Gideon Yoffe

IPC: H01S3/08 ,  H01S5/50 ,  H01S5/0683 ,  H01S5/06 ,  H01S5/14 ,  H01S5/02 ,  H01S5/068 ,  H01S5/00 ,  G02F1/225 ,  G02F1/21

CPC classification number: H01S5/5045 ,  H01S5/0078 ,  H01S5/021 ,  H01S5/0612 ,  H01S5/0683 ,  H01S5/06817 ,  H01S5/14 ,  H01S5/141 ,  H01S5/142 ,  G02F1/212 ,  G02F1/225 ,  G02F2203/50 ,  H01S5/06821

Abstract: A laser for a distributed fiber sensing system may have a frequency discriminator integrated with the laser. The laser may be an external cavity laser, with at least a portion of the laser cavity on a planar lightwave circuit, which also includes the frequency discriminator.

公开(公告)号：US11855412B1

公开(公告)日：2023-12-26

申请号：US16836274

申请日：2020-03-31

Applicant: Acacia Communications, Inc.

Inventor： Christopher Doerr ,  Xue Huang

IPC: H01S5/14 ,  H01S3/10 ,  H01S5/10 ,  H01S3/106 ,  H01S3/105 ,  H01S5/0687 ,  H01S3/137 ,  H01S3/13 ,  H01S5/068

CPC classification number: H01S5/142 ,  H01S3/105 ,  H01S3/10053 ,  H01S3/1062 ,  H01S3/137 ,  H01S3/1307 ,  H01S5/0687 ,  H01S5/06821 ,  H01S5/1071 ,  H01S5/141

Abstract: A method, apparatus, and system for an external cavity laser with a Michelson Interferometer.

公开(公告)号：US11754907B2

公开(公告)日：2023-09-12

申请号：US17226608

申请日：2021-04-09

Applicant: LioniX International BV

Inventor： Jörn Philipp Epping

IPC: G02F1/35 ,  H01S5/14 ,  H01S5/026 ,  G02F1/365 ,  G02B6/293 ,  G02B6/12 ,  G02F1/39

CPC classification number: G02F1/3536 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/29343 ,  G02F1/3526 ,  G02F1/365 ,  H01S5/026 ,  H01S5/142 ,  G02F1/39

Abstract: Aspects of the present disclosure are directed to photon-pair sources based on an external-cavity laser comprising a gain element and a planar-lightwave circuit that includes a surface-waveguide-based mirror and a ring resonator that enables four-wave mixing, where the surface-waveguide mirror and the ring resonator reside within the gain cavity of the laser itself. As a result, photon-pair sources in accordance with the present disclosure can have: (1) a larger free-spectral range for the entire laser cavity to enable generation of a single wavelength to realize single-mode operation without additional stabilization; and (2) low laser noise, thereby enabling detection and use of the generated photon pairs.

公开(公告)号：US11728619B2

公开(公告)日：2023-08-15

申请号：US16922622

申请日：2020-07-07

Applicant: INPHI CORPORATION

Inventor： Xiaoguang He ,  Radhakrishnan L. Nagarajan

IPC: H01S5/028 ,  H01S5/02 ,  H01S5/026 ,  H01S5/14 ,  H01S5/20 ,  H01S5/343 ,  H01S5/227 ,  H01S5/065 ,  H01S5/06 ,  H01S5/50 ,  H01S5/10 ,  H01S5/00

CPC classification number: H01S5/0287 ,  H01S5/021 ,  H01S5/026 ,  H01S5/142 ,  H01S5/2022 ,  H01S5/0078 ,  H01S5/0218 ,  H01S5/0612 ,  H01S5/0654 ,  H01S5/1085 ,  H01S5/227 ,  H01S5/34306 ,  H01S5/50

Abstract: A method for improving wide-band wavelength-tunable laser. The method includes configuring a gain region between a first facet and a second facet and crosswise a PN-junction with an active layer between P-type cladding layer and N-type cladding layer. The method further includes coupling a light excited in the active layer and partially reflected from the second facet to pass through the first facet to a wavelength tuner configured to generate a joint interference spectrum with multiple modes separated by a joint-free-spectral-range (JFSR). Additionally, the method includes configuring the second facet to have reduced reflectivity for increasing wavelengths. Furthermore, the method includes reconfiguring the gain chip with an absorption layer near the active layer to induce a gain loss for wavelengths shorter than a longest wavelength associated with a short-wavelength side mode. Moreover, the method includes outputting amplified light at a basic mode via the second facet.

公开(公告)号：US20230187904A1

公开(公告)日：2023-06-15

申请号：US18165293

申请日：2023-02-06

Applicant: DustPhotonics

Inventor： Yoel Chetrit ,  Israel Weiss

IPC: H01S5/14 ,  H01S5/02251 ,  H01S5/0683

CPC classification number: H01S5/142 ,  H01S5/02251 ,  H01S5/0683

Abstract: A method for aligning chip regions.

公开(公告)号：US20230179305A1

公开(公告)日：2023-06-08

申请号：US18162281

申请日：2023-01-31

Applicant: Ayar Labs, Inc.

Inventor： Matthew Sysak

IPC: H04B10/40 ,  H01S5/14

CPC classification number: H04B10/40 ,  H01S5/142 ,  H01S5/02251

Abstract: An optical data communication system includes a plurality of resonator structures and a laser array that includes a plurality of lasers optically connected to the plurality of resonator structures. Each resonator structure has a respective free spectral wavelength range and a respective resonance wavelength. A maximum difference in resonance wavelength between any two resonator structures in the plurality of resonator structures is less than a minimum free spectral wavelength range of any resonator structure in the plurality of resonator structures. Each laser in the plurality of lasers is configured to generate continuous wave light having a respective wavelength. The laser array has a central wavelength. A variability of the central wavelength is greater than a minimum difference in resonance wavelength between any two spectrally neighboring resonator structures in the plurality of resonator structures.

公开(公告)号：US20190097383A1

公开(公告)日：2019-03-28

申请号：US16138304

申请日：2018-09-21

Applicant: FUJITSU LIMITED ,  Photonics Electronics Technology Research Association

Inventor： Tomoyuki Akiyama

IPC: H01S5/00 ,  H01S5/50 ,  H01S3/08 ,  G02B27/09 ,  G02B6/122

CPC classification number: H01S5/0085 ,  G02B6/122 ,  G02B27/0977 ,  H01S3/08027 ,  H01S3/1062 ,  H01S5/0287 ,  H01S5/0612 ,  H01S5/0687 ,  H01S5/142 ,  H01S5/50 ,  H01S2301/02

Abstract: A modulated light source includes a reflective semiconductor optical amplifier including a mirror at a first end of the reflective semiconductor optical amplifier, a modulator configured to modulate a central wavelength, a first mirror configured to reflect light transmitted by the modulator, an optical filter disposed between a second end of the reflective semiconductor optical amplifier and the modulator, and a second mirror configured to reflect part of incoming light and to transmit the other part of the incoming light. The reflective semiconductor optical amplifier, the optical filter, and the second mirror configure a Fabry-Perot laser. The first mirror is configured to feed light emitted from the Fabry-Perot laser back to the Fabry-Perot laser, and the modulated light source is configured to select light corresponding to one of longitudinal modes oscillated by the Fabry-Perot laser, to modulate the selected light, and to output the modulated light.