公开(公告)号：US20240136801A1

公开(公告)日：2024-04-25

申请号：US18199268

申请日：2023-05-17

Applicant: Nuburu, Inc.

Inventor： Mark S. Zediker ,  Robert Stegeman

IPC: H01S5/40 ,  H01S5/00 ,  H01S5/14

CPC classification number: H01S5/4012 ,  H01S5/0078 ,  H01S5/14 ,  H01S5/4062 ,  H01S5/4068 ,  H01S5/4075 ,  H01S5/4087 ,  H01S5/0287

Abstract: Apparatus, systems and methods to spectrally beam combine a group of diode lasers in an external cavity arrangement. A dichroic beam combiner or volume Bragg grating beam combiner is placed in an external cavity to force each of the diode lasers or groups of diode lasers to oscillate at a wavelength determined by the passband of the beam combiner. In embodiments the combination of a large number of laser diodes in a sufficiently narrow bandwidth to produce a high brightness laser source that has many applications including as to pump a Raman laser or Raman amplifier.

公开(公告)号：US11848539B2

公开(公告)日：2023-12-19

申请号：US17665566

申请日：2022-02-06

Applicant: Georgios Margaritis

Inventor： Georgios Margaritis

IPC: H01S3/30 ,  H01S5/14 ,  H01S5/125 ,  H01S5/02251 ,  H01S5/024 ,  H01S5/06 ,  H01S5/12

CPC classification number: H01S5/146 ,  H01S5/141 ,  H01S5/147 ,  H01S5/02251 ,  H01S5/02415 ,  H01S5/0612 ,  H01S5/12 ,  H01S5/125 ,  H01S5/14

Abstract: A novel narrow linewidth laser device is disclosed that includes a gain element, such as a quantum well, quantum dot or bulk waveguide laser chip and a fiber Bragg grating formed in an optical fiber positioned to receive the output from a first end of the gain element and return a portion of said output back into the gain element. The fiber Bragg grating is constructed so that its power reflectivity profile has a ratio of reflectivity slope over reflectivity at the 3 dB point below the reflectivity peak on the red side (longer wavelength side) of the grating larger than a value of 2/nm. The operating wavelength of the device may be tuned thermally, electrically, or thermo-electrically to be on the red side of the fiber Bragg grating reflectivity profile, preferably, but not necessarily, at the 3 dB point below the reflectivity peak or lower. In another embodiment, a second grating is optically coupled to a second end of the gain element and has a reflectivity profile that overlaps at least a portion of the reflectivity profile of the front end fiber Bragg grating.

公开(公告)号：US11658466B2

公开(公告)日：2023-05-23

申请号：US17068339

申请日：2020-10-12

Applicant: Nuburu, Inc.

Inventor： Mark S. Zediker ,  Robert Stegeman

IPC: H01S3/08 ,  H01S5/40 ,  H01S5/00 ,  H01S5/14 ,  H01S5/028 ,  H01S5/02251

CPC classification number: H01S5/4012 ,  H01S5/0078 ,  H01S5/14 ,  H01S5/4062 ,  H01S5/4068 ,  H01S5/4075 ,  H01S5/4087 ,  H01S3/08059 ,  H01S5/0287 ,  H01S5/02251 ,  H01S5/141 ,  H01S5/405 ,  H01S5/4093

Abstract: Apparatus, systems and methods to spectrally beam combine a group of diode lasers in an external cavity arrangement. A dichroic beam combiner or volume Bragg grating beam combiner is placed in an external cavity to force each of the diode lasers or groups of diode lasers to oscillate at a wavelength determined by the passband of the beam combiner. In embodiments the combination of a large number of laser diodes in a sufficiently narrow bandwidth to produce a high brightness laser source that has many applications including as to pump a Raman laser or Raman amplifier.

公开(公告)号：US20180316159A1

公开(公告)日：2018-11-01

申请号：US15814087

申请日：2017-11-15

Applicant: Arizona Board of Regents on behalf of The University of Arizona

Inventor： Isak R. Kilen ,  Stephan W. Koch ,  Jerome V. Moloney

IPC: H01S5/065 ,  H01S5/042 ,  H01S3/11 ,  H01S3/06 ,  H01S5/187 ,  H01S5/183 ,  H01S5/14 ,  H01S5/04 ,  H01S3/094 ,  H01S5/024 ,  H01S5/34

CPC classification number: H01S5/065 ,  H01S3/0604 ,  H01S3/094026 ,  H01S3/1115 ,  H01S3/1118 ,  H01S5/02484 ,  H01S5/041 ,  H01S5/042 ,  H01S5/0657 ,  H01S5/14 ,  H01S5/18341 ,  H01S5/18383 ,  H01S5/187 ,  H01S5/34

Abstract: A surface-emitting semiconductor laser system contains at least one MQW unit of at least three constituent QWs, axially separated from one another substantially non-equidistantly. The MQW unit is located within the axial extent covered, in operation of the laser, by a half-cycle of the standing wave of the field at a wavelength within the gain spectrum of the gain medium; immediately neighboring nodes of the standing wave are on opposite sides of the MQW unit. So-configured MQW unit can be repeated multiple times and/or complemented with individual QWs disposed outside of the half-cycle of the standing wave with which such MQW unit is associated. The semiconductor laser further includes a pump source configured to input energy in the semiconductor gain medium and a mode-locking element to initiate mode-locking.

公开(公告)号：US10063028B2

公开(公告)日：2018-08-28

申请号：US14528450

申请日：2014-10-30

Applicant: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

Inventor： Alex A Behfar ,  Alfred T Schremer, Jr. ,  Cristian Stagarescu

IPC: H01S5/10 ,  H01S5/0687 ,  H01S5/028 ,  H01S5/068 ,  G02B6/12 ,  H01S5/125 ,  H01S5/00 ,  H01S5/065 ,  H01S5/14

CPC classification number: H01S5/0287 ,  G02B6/12004 ,  H01S5/005 ,  H01S5/0085 ,  H01S5/0656 ,  H01S5/06817 ,  H01S5/0687 ,  H01S5/1021 ,  H01S5/1071 ,  H01S5/1082 ,  H01S5/1085 ,  H01S5/125 ,  H01S5/14

Abstract: Unidirectionality of lasers is enhanced by forming one or more etched gaps in the laser cavity. The gaps may be provided in any segment of a laser, such as any leg of a ring laser, or in one leg of a V-shaped laser. A Brewster angle facet at the distal end of a photonic device coupled to the laser reduces back-reflection into the laser cavity. A distributed Bragg reflector is used at the output of a laser to enhance the side-mode suppression ratio of the laser.

公开(公告)号：US09964702B1

公开(公告)日：2018-05-08

申请号：US15292501

申请日：2016-10-13

Applicant: Oracle International Corporation

Inventor： Ying Luo ,  Xuezhe Zheng ,  Ashok V. Krishnamoorthy

IPC: G02B6/12 ,  G02B6/132 ,  G02B6/136 ,  H01S5/30 ,  H01S5/026 ,  H01S5/10

CPC classification number: G02B6/12004 ,  G02B6/12002 ,  G02B6/132 ,  G02B6/136 ,  G02B2006/12104 ,  G02B2006/12147 ,  H01S3/0813 ,  H01S5/021 ,  H01S5/02252 ,  H01S5/02469 ,  H01S5/1035 ,  H01S5/14

Abstract: The disclosed embodiments provide a system that implements an optical interface. The system includes a semiconductor chip with a silicon layer, which includes a silicon waveguide, and an interface layer (which can be comprised of SiON) disposed over the silicon layer, wherein the interface layer includes an interface waveguide. The system also includes an optical coupler that couples an optical signal from the silicon waveguide in the silicon layer to the interface waveguide in the interface layer, wherein the interface waveguide channels the optical signal in a direction parallel to a top surface of the semiconductor chip. The system additionally includes a mirror, which is oriented to reflect the optical signal from the interface waveguide in a surface-normal direction so that the optical signal exits the top surface of the semiconductor chip.

公开(公告)号：US09859983B2

公开(公告)日：2018-01-02

申请号：US15285123

申请日：2016-10-04

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： Jason S. Orcutt

IPC: H04B10/50 ,  G02B6/293 ,  H04J14/06 ,  H01S5/323 ,  H04B10/80 ,  G02B6/27 ,  H01S5/062 ,  H01S5/068 ,  G02B6/12 ,  H01S5/0687 ,  H04B10/516 ,  H01S5/30 ,  H04J14/02 ,  H01S5/14 ,  H01S5/10 ,  H01S3/23 ,  G02B6/126 ,  H01S5/02 ,  H01S5/028 ,  H01S5/04 ,  H01S5/40

CPC classification number: H04B10/503 ,  G02B6/00 ,  G02B6/12004 ,  G02B6/126 ,  G02B6/2773 ,  G02B6/29382 ,  G02B2006/12164 ,  H01S3/2391 ,  H01S5/021 ,  H01S5/0287 ,  H01S5/041 ,  H01S5/06246 ,  H01S5/06821 ,  H01S5/0687 ,  H01S5/1028 ,  H01S5/14 ,  H01S5/141 ,  H01S5/142 ,  H01S5/146 ,  H01S5/3013 ,  H01S5/323 ,  H01S5/4031 ,  H01S2301/163 ,  H04B10/5053 ,  H04B10/506 ,  H04B10/516 ,  H04B10/801 ,  H04J14/02 ,  H04J14/06

Abstract: A technique relates to a superchannel. Laser cavities include a first laser cavity, a next laser cavity, through a last laser cavity. Modulators include a first modulator, a next modulator, through a last modulator, each having a direct input, an add port, and an output. A concatenated arrangement of the laser cavities is configured to form the superchannel, which includes the last laser cavity coupled to the direct input of the last modulator, and the output of the last modulator coupled to the add port of the next modulator. The arrangement includes the next laser cavity coupled to direct input of the next modulator, and the output of the next modulator coupled to add port of first modulator, along with the first laser cavity coupled to direct input of the first modulator, and the output of first modulator coupled to input of a multiplexer, thus forming the superchannel into multiplexer.

公开(公告)号：US20170373543A1

公开(公告)日：2017-12-28

申请号：US15591151

申请日：2017-05-10

Applicant: WI-CHARGE LTD.

Inventor： ORTAL ALPERT ,  RUDIGER PASCHOTTA

IPC: H02J50/30 ,  H01S3/06 ,  H01S3/08 ,  H01S3/083 ,  H01S5/10 ,  H01S3/00 ,  H04B10/80 ,  H04B10/114 ,  H04B1/04 ,  H01S5/04 ,  H01S5/14 ,  H01S5/183 ,  H01S3/0941 ,  H01S3/13

CPC classification number: H02J50/30 ,  H01S3/005 ,  H01S3/0604 ,  H01S3/0805 ,  H01S3/08059 ,  H01S3/08072 ,  H01S3/083 ,  H01S3/0941 ,  H01S3/1307 ,  H01S5/041 ,  H01S5/10 ,  H01S5/14 ,  H01S5/183 ,  H04B10/114 ,  H04B10/807 ,  H04B2001/0416

Abstract: An optical power beam transmission system, with a directional light transmitter and receiver. The transmitter contains an amplifying laser medium, and this together with a retroreflector in the receiver, forms a laser resonator. When lasing sets in, the receiver can extract optical power through an output coupler and convert it to electrical power. The gain medium may be a disc having a thickness substantially smaller than its lateral dimensions. The laser resonator is operated as a stable resonator to ensure safe operation. This is achieved by use of an adaptive optical element, for reducing the diameter of the energy beam impinging on the gain medium, thereby increasing the overlap between the energy beam and the gain medium. As the transmitter-receiver distance is changed, such as by movement of the receiver, the adaptive optical element focal length changes to ensure that the cavity remains within its stability zone.

公开(公告)号：US20170373462A1

公开(公告)日：2017-12-28

申请号：US15634563

申请日：2017-06-27

Applicant: Government of the United States of America, as Represented by the Secretary of Commerce

Inventor： FELIPE GUZMAN ,  JACOB M. TAYLOR ,  JON R. PRATT

IPC: H01S3/105 ,  H01S5/14 ,  H01S5/0687 ,  H01S3/11 ,  G01B11/14 ,  H01S5/183 ,  G01B11/02

CPC classification number: H01S3/105 ,  G01B11/02 ,  G01B11/14 ,  H01S3/1115 ,  H01S5/02236 ,  H01S5/02284 ,  H01S5/041 ,  H01S5/0602 ,  H01S5/0687 ,  H01S5/14 ,  H01S5/183 ,  H01S5/18361

Abstract: An optomechanical laser includes: a basal member; a mechanical transducer; a laser disposed on the mechanical transducer, the laser being displaced along the displacement axis in response to a displacement of the mechanical transducer relative to the basal member; a mirror disposed on the armature in optical communication with the laser and opposing the laser; the armature disposed on the basal member and rigidly connecting the mirror to the basal member such that the mirror and the armature move in synchrony with the basal member, and the armature provides a substantially constant distance between the basal member and the mirror; and a cavity comprising: the laser; the mirror; and a cavity length between the laser and the mirror that changes in response to displacement of the laser according to the displacement of the mechanical transducer relative to the basal member, the optomechanical laser providing laser light.

公开(公告)号：US09831635B2

公开(公告)日：2017-11-28

申请号：US15237833

申请日：2016-08-16

Applicant: Coriant Advanced Technology, LLC

Inventor： Yi Zhang ,  Shuyu Yang ,  Michael J. Hochberg ,  Thomas Wetteland Baehr-Jones

IPC: H01S3/10 ,  H01S5/14 ,  H01S5/02 ,  H01S5/10 ,  H01S5/40 ,  H01S3/00 ,  H01S5/34 ,  H01S5/068 ,  H01S5/343

CPC classification number: H01S5/141 ,  H01S3/005 ,  H01S3/0078 ,  H01S5/021 ,  H01S5/06804 ,  H01S5/1032 ,  H01S5/1096 ,  H01S5/14 ,  H01S5/142 ,  H01S5/146 ,  H01S5/3412 ,  H01S5/343 ,  H01S5/4062

Abstract: A hybrid external cavity multi-wavelength laser using a QD RSOA and a silicon photonics chip is demonstrated. Four lasing modes at 2 nm spacing and less than 3 dB power non-uniformity were observed, with over 20 mW of total output power. Each lasing peak can be successfully modulated at 10 Gb/s. At 10−9 BER, the receiver power penalty is less than 2.6 dB compared to a conventional commercial laser. An expected application is the provision of a comb laser source for WDM transmission in optical interconnection systems.