公开(公告)号：US11133652B2

公开(公告)日：2021-09-28

申请号：US16945719

申请日：2020-07-31

Applicant: Aurelien David ,  Rafael I. Aldaz

Inventor： Aurelien David ,  Rafael I. Aldaz

IPC: H01S5/10 ,  H01S5/42 ,  B82Y20/00 ,  H01S5/04 ,  H01S5/14 ,  H01S5/183

Abstract: Optical devices and methods of manufacturing and operating such optical devices. In an embodiment, an optical device includes a substrate, a multi-layer structure having a first surface in contact with a first surface of the substrate, a first mirror disposed over a second surface of the multi-layer structure, a second mirror disposed over a second surface of the substrate, an intermediate mirror within the multi-layer structure, and an optical gain structure within the multi-layer structure. The device may include a first optically resonant cavity within the multi-layer structure, bounded by the first mirror and the intermediate mirror, where the first optically resonant cavity includes the optical gain structure. The device may further include a second optically resonant cavity, bounded by the first and second mirrors, where the second optically resonant cavity includes the first optically resonant cavity, the second optically reflective layer, and the substrate.

公开(公告)号：US11133651B2

公开(公告)日：2021-09-28

申请号：US16697041

申请日：2019-11-26

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Akinori Noguchi ,  Yoshihiko Tani ,  Yoshimi Tanimoto ,  Yuhzoh Tsuda

IPC: H01S5/022 ,  H01S5/22 ,  H01S5/14 ,  H01S5/223 ,  H01S5/042 ,  B82Y20/00

Abstract: A nitride semiconductor laser device at least includes a ridge part disposed on a second-conductivity-type semiconductor layer, a conductive oxide layer covering the upper surface of the ridge part and portions of opposite side surfaces of the ridge part, a dielectric layer covering a portion of the conductive oxide layer, and a first metal layer covering the conductive oxide layer and the dielectric layer, wherein a portion of the conductive oxide layer disposed on the upper surface of the ridge part is exposed through the dielectric layer and covered with the first metal layer.

公开(公告)号：US20210296858A1

公开(公告)日：2021-09-23

申请号：US17266128

申请日：2019-09-09

Applicant: II-VI Suwtech, Inc.

Inventor： Quan ZHOU ,  Dashan LI ,  Yaping ZHAO ,  Pingping YE

IPC: H01S5/10 ,  H01S3/081 ,  H01S5/40 ,  H01S5/14 ,  H01S5/028

Abstract: A laser beam combining device with an unstable resonator cavity includes a semiconductor laser source configured to emit a plurality of laser beams to a beam shaper to form a plurality of parallel laser beams and the parallel laser beams are focused, by a transform lens, to a diffraction grating, wherein the diffraction grating diffracts the focused laser beams to form a combined laser beam, wherein the transform lens is disposed between the semiconductor laser source and the diffraction grating and an output coupler including a cylindrical surface with partial reflection coating, wherein a portion of the combined laser beams is oscillated between the cylindrical surface and the back facet of the semiconductor laser, and the portion of the combined laser beams is emitted via the output coupler.

公开(公告)号：US20210281048A1

公开(公告)日：2021-09-09

申请号：US17195794

申请日：2021-03-09

Applicant: Thorlabs Quantum Electronics, Inc.

Inventor： Peter S.J. HEIM ,  John HRYNIEWICZ ,  Jacob MERTZ ,  Jianfei WANG

IPC: H01S5/14 ,  H01S5/026 ,  H01S5/0683 ,  G01B9/02

Abstract: A tunable laser assembly housed in a single enclosure and a method of control is described wherein the tunable laser, pump and semiconductor optical amplifier do not share a common optical axis but are all aligned to optical waveguides on an intervening planar lightwave circuit (PLC). Wavelength monitoring circuitry is included on the PLC to enable monitoring and control of the tunable laser center wavelength and optical bandwidth. The design of the PLC does not introduce perturbations into the swept-source laser output spectrum that would cause artifacts in imaging applications such as optical coherence tomography (OCT).

公开(公告)号：US11101621B2

公开(公告)日：2021-08-24

申请号：US16683440

申请日：2019-11-14

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

Inventor： Quentin Wilmart ,  Karim Hassan

IPC: H01S5/14 ,  G02F1/225 ,  H01S5/026 ,  H01S5/10 ,  H01S5/125 ,  H01S5/20 ,  H01S5/30 ,  H01S5/50 ,  G02F1/21

Abstract: A semiconductor laser source including a Mach-Zehnder interferometer including first and second arms. Each of these arms being divided into a plurality of consecutive sections. The first and second arms each include a gain-generating section forming first and second gain-generating waveguides, respectively. The laser source includes power sources able to deliver currents through the gain-generating waveguides such that the following condition is met: ∑ n = 1 N 2 ⁢ L 2 , n ⁢ neff 2 , n - ∑ n = 1 N 1 ⁢ L 1 , n ⁢ neff 1 , n = k f ⁢ λ Si where: kf is a preset integer number higher than or equal to 1, N1 and N2 are the numbers of sections in the first and second arms, respectively, L1,n and L2,n are the lengths of the nth sections of the first and second arms, respectively, neff1,n and neff2,n are the effective indices of the nth sections of the first and second arms, respectively.

公开(公告)号：US20210257806A1

公开(公告)日：2021-08-19

申请号：US17306162

申请日：2021-05-03

Applicant: Pranalytica, Inc.

Inventor： C. Kumar N. Patel ,  Arkadiy Lyakh

IPC: H01S3/106 ,  H01S5/0625 ,  H01S5/14 ,  H01S5/00

Abstract: A semiconductor laser tuned with an acousto-optic modulator. The acousto-optic modulator may generate standing waves or traveling waves. When traveling waves are used, a second acousto-optic modulator may be used in a reverse orientation to cancel out a chirp created in the first acousto-optic modulator. The acousto-optic modulator may be used with standing-wave laser resonators or ring lasers.

公开(公告)号：US11095095B2

公开(公告)日：2021-08-17

申请号：US16553039

申请日：2019-08-27

Applicant: Arizona Board of Regents on Behalf of the University of Arizona

Inventor： Yushi Kaneda

IPC: H01S5/14 ,  H01S5/323

Abstract: External cavity diode laser (ECDL) devices and methods for producing the same are described that allows ECDLs to be readily produced and configured to operate at a desired range of wavelengths, while allowing tunability of the output wavelength. One ECDL includes a laser gain chip including a gain medium, a first reflective surface at a first end of the gain medium, and a second surface at a second end of the gain medium opposite to the first reflective surface. The second surface has a facet that forms an angle approximately equal to Brewster's angle for light having a first wavelength. The ECDL further includes a diffraction grating positioned to receive light that passes through the second surface, to operate as a mirror in the external cavity diode laser, and to allow a portion of the light to be directed outside of the external cavity diode laser as output light.

公开(公告)号：US20210239906A1

公开(公告)日：2021-08-05

申请号：US17268535

申请日：2018-08-16

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Neng Liu ,  Robert Brunner ,  Stephane Lessard

IPC: G02B6/12 ,  H01S5/14 ,  H01S5/026 ,  G02B6/42

Abstract: According to an aspect, an optical system includes a laser diode configured to emit optical signals and at least two size-switchable broken racetrack ring resonators optically coupled to an optical waveguide, where each broken racetrack ring resonator is configured to exhibit a resonant wavelength. The optical system also includes a tuning arrangement associated with the broken racetrack ring resonators, where the tuning arrangement includes a micro electro-mechanical system (MEMS) or nano electro-mechanical system (NEMS) actuator mechanically coupled to a first portion of a first one of the broken racetrack ring resonators and configured to mechanically move the first portion so as to change the resonant wavelength of the first one of the broken racetrack ring resonators.

公开(公告)号：US11038319B2

公开(公告)日：2021-06-15

申请号：US16683402

申请日：2019-11-14

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

Inventor： Quentin Wilmart ,  Karim Hassan

IPC: H01S5/00 ,  H01S5/10 ,  G02F1/225 ,  H01S5/065 ,  H01S3/07 ,  H01S5/14 ,  H01S5/026 ,  H01S5/125 ,  H01S5/02 ,  H01S3/063 ,  G02F1/21 ,  H01S5/323 ,  H01S5/343 ,  H01S5/40 ,  H01S5/30

Abstract: A semiconductor laser source including a Mach-Zehnder interferometer, this interferometer including first and second arms. Each of the arms is divided into a plurality of consecutive sections, the effective index of each section located immediately after a preceding section being different from the effective index of this preceding section. The lengths of the various sections meet the following condition: ∑ n = 1 N 2 ⁢ L 2 , n ⁢ neff 2 , n - ∑ n = 1 N 1 ⁢ L 1 , n ⁢ neff 1 , n = k f ⁢ λ Si where: kf is a preset integer number higher than or equal to 1, N1 and N2 are the numbers of sections in the first and second arms, respectively, L1,n and L2,n are the lengths of the nth sections of the first and second arms, respectively, neff1,n and neff2,n are the effective indices of the nth sections of the first and second arms, respectively. The first and second arms each comprise a gain-generating section.

公开(公告)号：US20210167575A1

公开(公告)日：2021-06-03

申请号：US17104485

申请日：2020-11-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD

Inventor： Matthew SAUTER ,  Bryan LOCHMAN ,  Oscar CORRIPIO ,  Bien CHANN

IPC: H01S5/024 ,  H01S5/0239 ,  H01S5/02218 ,  H01S5/14

Abstract: In various embodiments, laser resonators include enclosed cooling manifolds defining protrusions each configured to conduct heat-exchange fluid to a beam emitter in the resonator. Installation of such cooling manifolds may be facilitated via use of a rigid installation tool functioning as a mechanical reference, prior to installation of the beam emitters and sealing of the beam emitters to the cooling manifold.