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公开(公告)号：US20230268719A1
公开(公告)日：2023-08-24
申请号：US18112006
申请日：2023-02-21
Applicant: EXFO Optics, SAS
Inventor： Alain MUGNIER
IPC: H01S5/14 , H01S5/02253
CPC classification number: H01S5/143 , H01S5/02253
Abstract: There is provided a tunable external-cavity laser and a tunable laser source based on such tunable external-cavity laser. The tunable external-cavity laser comprises: two reflective surfaces to form a laser cavity therebetween; an active waveguide for amplifying laser light propagating in the laser cavity; a tunable wavelength-selective filter within the laser cavity for selecting the emission wavelength of the tunable external-cavity laser with in a tuning range; and a collimating lens system for collimating the optical beam out of the active waveguide for propagation in the laser cavity. The collimating lens system comprises an imaging lens and a collimating lens for collimating the optical beam. The imaging lens induces a positive chromatism within the tuning range and the collimating lens comprises a complex lens inducing a negative chromatism within the tuning range so as to at least partially compensate for the positive chromatism induced by the imaging lens.
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公开(公告)号：US11705694B1
公开(公告)日：2023-07-18
申请号：US17187237
申请日：2021-02-26
Applicant: CABLE TELEVISION LABORATORIES, INC.
Inventor： Haipeng Zhang , Zhensheng Jia , Luis Alberto Campos , Mu Xu , Junwen Zhang
CPC classification number: H01S5/4006 , H01S5/005 , H01S5/0288 , H01S5/0656 , H01S5/14 , H01S5/141 , H04B10/503
Abstract: An injection locking laser source is provided for an optical communications system. The injection locking laser source includes a laser cavity configured to receive an externally injected low linewidth primary light source. The laser cavity includes a cavity length, a cavity facet reflectivity, and a cavity quality factor. The injection locking laser source further includes an emitting region configured to output a secondary light source injection locked to the externally injected low linewidth primary light source at a stable detuning frequency based on a photon number, a steady-state phase, and a carrier number of the primary light source injected into the cavity.
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公开(公告)号：US11699892B2
公开(公告)日：2023-07-11
申请号：US16889656
申请日：2020-06-01
Applicant: ROCKLEY PHOTONICS LIMITED
Inventor： Aaron Zilkie
IPC: H01S5/14 , H01S5/10 , H01S5/125 , H01S5/026 , H01S5/068 , H01S5/50 , H01S5/12 , H01S5/40 , H01S5/00
CPC classification number: H01S5/1092 , H01S5/0268 , H01S5/068 , H01S5/124 , H01S5/125 , H01S5/142 , H01S5/50 , H01S5/005 , H01S5/141 , H01S5/4012 , H01S5/4062
Abstract: A discrete wavelength tunable laser having an optical cavity which comprises: a reflective semiconductor optical amplifier (SOA); a demultiplexer (Demux) having a single input and a plurality of outputs, the Demux configured to receive the output of the SOA and to produce a plurality of fixed spectral passbands within the gain bandwidth of the SOA; one or more tunable distributed Bragg reflector(s) (DBR(s)) arranged to receive the outputs of the Demux, each tunable DBR configured to select a reflective spectral band within the gain bandwidth of the SOA upon application of a bias current; wherein the SOA forms the back end mirror of the optical cavity; the one or more tunable DBRs form the front end mirror of the optical cavity; and wherein the lasing channel of the discrete wavelength tunable laser is chosen by the overlap of the selected reflective spectral band of one of the one or more tunable DBRs with a fixed spectral passband of the Demux.
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公开(公告)号：US11695247B2
公开(公告)日：2023-07-04
申请号：US16137691
申请日：2018-09-21
Inventor： Wang-Long Zhou , Francisco Villarreal-Saucedo
IPC: H01S3/00 , H01S3/094 , H01S3/093 , F21V8/00 , B23K26/38 , B23K26/06 , H01S5/40 , G02B27/09 , B23K26/21 , B23K26/064 , G02B27/30 , H01S5/026 , H01S5/14 , G02B6/42
CPC classification number: H01S3/094042 , B23K26/064 , B23K26/0648 , B23K26/21 , B23K26/38 , G02B6/0006 , G02B27/0955 , H01S3/005 , H01S3/0071 , H01S3/093 , H01S5/4062 , G02B6/4296 , G02B27/30 , H01S5/026 , H01S5/143 , H01S5/4031 , H01S5/4068
Abstract: In various embodiments, one or more optical elements are utilized to alter the numerical aperture of a radiation beam received from an optical fiber in order to accommodate the properties of a downstream collimator within a laser delivery head.
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公开(公告)号：US20230208104A1
公开(公告)日：2023-06-29
申请号：US17923886
申请日：2021-05-07
Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
Inventor： Michele TAMAGNONE , Marco PICCARDO , Dmitry KAZAKOV , Christina Maria SPÄGELE , Federico CAPASSO
CPC classification number: H01S5/141 , H01S5/0283 , H01S5/0687 , G02B1/005 , G02B26/0816 , B82Y20/00
Abstract: A laser device includes a gain medium including a facet. The laser device includes a metasurface including a plurality of supercells. The metasurface is disposed on a substrate and configured to reflect and focus a first portion of light from the facet back to the gain medium as a feedback beam. The metasurface can be configured to reflect a second portion of the light as an output beam at an angle that is nonzero relative to a direction of the feedback beam. The metasurface can be configured to transmit a second portion of the light as an output beam through the metasurface away from the facet. The emission wavelength of the laser device can be tuned by translating the metasurface. The output beam can be collimated towards a fixed direction while tuning the wavelength.
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公开(公告)号：US11646549B2
公开(公告)日：2023-05-09
申请号：US16178478
申请日：2018-11-01
Applicant: Nuburu, Inc.
Inventor： Mark Zediker , Jean Philippe Feve , Matthew Silva Sa , Michael Jansen
IPC: H01S5/40 , H01S5/024 , H01S5/30 , H01S5/028 , G02B26/00 , H01S5/02251 , H01S5/02253 , H01S5/02326 , H01S3/094 , H01S3/0941 , H01S5/00 , H01S5/323 , H01S5/023 , H01S5/0233 , H01S5/0235 , H01S5/14 , H01S5/068 , H01S5/12
CPC classification number: H01S5/4012 , G02B26/00 , H01S3/09415 , H01S3/094046 , H01S3/094053 , H01S5/028 , H01S5/02251 , H01S5/02253 , H01S5/02326 , H01S5/02469 , H01S5/3013 , H01S5/4062 , H01S5/005 , H01S5/0071 , H01S5/023 , H01S5/0233 , H01S5/0235 , H01S5/02423 , H01S5/06821 , H01S5/12 , H01S5/141 , H01S5/143 , H01S5/146 , H01S5/32341 , H01S5/4031 , H01S5/4087
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
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公开(公告)号：US20230131908A1
公开(公告)日：2023-04-27
申请号：US18085643
申请日：2022-12-21
Applicant: University of Maryland, College Park
Inventor： Mario DAGENAIS , Yang ZHANG
IPC: H01S5/14 , H01S5/06 , H01S5/02326 , H01S5/0237 , H01S5/10
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.
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公开(公告)号：US20230123994A1
公开(公告)日：2023-04-20
申请号：US17706100
申请日：2022-03-28
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Minkyung LEE , Sunil KIM , Junghyun PARK , Byunggil JEONG
Abstract: Provided is a spatial light modulator includes a substrate; a distributed Bragg reflector (DBR) layer provided on a surface of the substrate; a cavity layer provided on the DBR layer; a pixel layer provided on the cavity layer, the pixel layer including a plurality of pixels; and a heat blocking member provided between the plurality of pixels and configured to block heat transfer between the plurality of pixels, wherein each of the plurality of pixels includes a plurality of active meta-patterns.
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公开(公告)号：US20230101630A1
公开(公告)日：2023-03-30
申请号：US17910005
申请日：2021-02-23
Applicant: ams-OSRAM International GmbH
Inventor： Bruno JENTZSCH , Hubert HALBRITTER
Abstract: An optoelectronic semiconductor laser component may include at least two laser units. The semiconductor laser component may have an output coupling surface configured to generate electromagnetic radiation in the semiconductor laser component. Each laser unit may include a laser resonator having a resonator axis, an output coupling mirror and a first and a second resonator mirror with a primary section of the resonator axis running laterally therebetween. The output coupling mirror may be formed by a partial region of the output coupling surface. Along the primary section of the resonator axis at least one contact strip is arranged on the output coupling surface, and extends to a metallic connection surface. The laser units may be aligned in such a way that the primary sections of the resonator axes run parallel to one another and the output coupling mirrors face one another.
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40.发明申请
公开(公告)号：US20230092813A1
公开(公告)日：2023-03-23
申请号：US17945271
申请日：2022-09-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Atsushi SUGIYAMA , Tadataka EDAMURA
IPC: H01S5/14 , H01S5/02326 , H01S5/34
Abstract: The laser module includes a QCL element, a diffraction grating unit, a first lens holder, a second lens holder, and a mount member. The fourth mounting portion of the mount member is provided with a placement hole into which the protruding portion of the diffraction grating unit is inserted. The placement hole is longer than the protruding portion so that the protruding portion can be slid in the X-axis direction relative to the placement hole. A wall surface for positioning the diffraction grating unit is provided between the third mounting portion and the fourth mounting portion. The diffraction grating unit includes a positioning surface facing the wall surface. The diffraction grating unit is fixed to the fourth mounting portion in a state where the protruding portion is inserted into the placement hole and the positioning surface is in surface contact with the wall surface.
