公开(公告)号：US20230420242A1

公开(公告)日：2023-12-28

申请号：US18465022

申请日：2023-09-11

Applicant: Hamamatsu Photonics K.K. ,  Energetiq Technology, Inc.

Inventor： Matthew Partlow ,  Donald K. Smith ,  Matthew Besen ,  Akinori Asai

IPC: H01J61/54 ,  H01S3/1115 ,  H01S3/094 ,  H01J65/00 ,  H01S3/091 ,  H01S3/16 ,  H01S3/06 ,  H01J61/16 ,  H01J65/04

CPC classification number: H01J61/54 ,  H01S3/1115 ,  H01S3/094038 ,  H01J65/00 ,  H01S3/0912 ,  H01S3/1623 ,  H01S3/1643 ,  H01S3/0602 ,  H01S3/0621 ,  H01J61/16 ,  H01J65/04 ,  H01S3/1305

Abstract: An electrodeless laser-driven light source includes a laser that generates a CW sustaining light. A pump laser generates pump light. A Q-switched laser crystal receives the pump light generated by the pump laser and generates pulsed laser light at an output in response to the generated pump light. A first optical element projects the pulsed laser light along a first axis to a breakdown region in a gas-filled bulb comprising an ionizing gas. A second optical element projects the CW sustaining light along a second axis to a CW plasma region in the gas-filled bulb comprising the ionizing gas. A detector detects plasma light generated by a CW plasma and generates a detection signal at an output. A controller generates control signals that control the pump light to the Q-switched laser crystal so as to extinguish the pulsed laser light within a time delay after the detection signal exceeds a threshold level.

公开(公告)号：US20190027889A1

公开(公告)日：2019-01-24

申请号：US15871065

申请日：2018-01-15

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won SONG ,  Pulak Chandra DEBNATH ,  Md. Siam UDDIN

IPC: H01S3/11 ,  H01S3/08 ,  H01S3/083 ,  C30B29/02

CPC classification number: H01S3/1115 ,  C30B25/105 ,  C30B29/02 ,  G02F1/0118 ,  G02F1/3536 ,  H01S3/0078 ,  H01S3/0092 ,  H01S3/08013 ,  H01S3/08054 ,  H01S3/083 ,  H01S3/2391

Abstract: A method for in situ synthesis of graphene along a lengthwise direction of a waveguide applied to a photonic device includes processing an evanescent field of laser propagating in the waveguide to spread outward the waveguide, depositing a nickel thin film on a surface of the waveguide, growing graphene between a surface of the waveguide and a nickel thin film by irradiating telecommunication laser to a core of the waveguide, and removing the nickel thin film from the waveguide. Accordingly, graphene with high optical nonlinearity is in situ synthesized in the photonic device.

公开(公告)号：US20180254601A1

公开(公告)日：2018-09-06

申请号：US15972259

申请日：2018-05-07

Applicant: Candela Corporation

Inventor： Jayant D. Bhawalkar ,  Xiaoming Shang

IPC: H01S3/16 ,  H01S3/23 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/092 ,  H01S3/094 ,  H01S3/131 ,  H01S3/11 ,  H01S3/109 ,  H01S3/113 ,  H01S3/10 ,  H01S3/00

CPC classification number: H01S3/1633 ,  H01S3/005 ,  H01S3/0071 ,  H01S3/0092 ,  H01S3/061 ,  H01S3/0612 ,  H01S3/0617 ,  H01S3/0625 ,  H01S3/0627 ,  H01S3/06754 ,  H01S3/08081 ,  H01S3/092 ,  H01S3/094053 ,  H01S3/094061 ,  H01S3/094069 ,  H01S3/094076 ,  H01S3/10023 ,  H01S3/109 ,  H01S3/1115 ,  H01S3/113 ,  H01S3/1301 ,  H01S3/1312 ,  H01S3/1611 ,  H01S3/1643 ,  H01S3/2308 ,  H01S2301/02

Abstract: A MOPA laser system that includes a seed laser configured to output pulsed laser light, an amplifier configured to receive and amplify the pulsed laser light emitted by the seed laser; and a pump laser configured to deliver a pump laser beam to both the seed laser and the amplifier and a variable attenuator configured to eliminate missing Q-switched pulses.

公开(公告)号：US20180048110A1

公开(公告)日：2018-02-15

申请号：US15552061

申请日：2016-03-15

Applicant: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE

Inventor： YOANN JESTIN ,  ROBERTO MORANDOTTI ,  MICHAEL KUES ,  BENJAMIN WETZEL ,  CHRISTIAN REIMER ,  PIOTR ROZTOCKI

IPC: H01S3/108 ,  H01S5/14 ,  G02B6/293 ,  H01S3/11

CPC classification number: H01S3/1115 ,  G02B6/29338 ,  G02B6/29341 ,  H01S3/0078 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/108 ,  H01S3/1083 ,  H01S3/1109 ,  H01S3/1112 ,  H01S5/14

Abstract: A method and a system for pulsed excitation of a nonlinear medium for photon pair generation, he method comprising exciting a single narrow resonance of a nonlinear resonant element with a pulsed laser field, comprising embedding a nonlinear resonant element directly into an external laser cavity and locking the cavity modes.

公开(公告)号：US09887511B2

公开(公告)日：2018-02-06

申请号：US15401251

申请日：2017-01-09

Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES

Inventor： Takunori Taira ,  Arvydas Kausas ,  Lihe Zheng

IPC: H01S3/11 ,  H01S3/0941 ,  H01S3/16

CPC classification number: H01S3/1115 ,  H01S3/094053 ,  H01S3/094076 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/10053 ,  H01S3/1022 ,  H01S3/113 ,  H01S3/1611 ,  H01S3/1643

Abstract: Provided is a passive Q-switch laser device possessing a power density controller (15) making power density of excitation light from an excitation light source (14) equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium (12) becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium (12).

公开(公告)号：US20180034244A1

公开(公告)日：2018-02-01

申请号：US15551955

申请日：2016-03-08

Applicant: Kazuma IZUMIYA ,  Naoto JIKUTANI ,  Masayuki NUMATA

Inventor： Kazuma IZUMIYA ,  Naoto JIKUTANI ,  Masayuki NUMATA

IPC: H01S5/42 ,  H01S5/026 ,  H01S5/042 ,  H01S5/22 ,  H01S3/0941 ,  H01S3/11 ,  H01S3/00 ,  H01S3/16 ,  H01S3/06 ,  F02P23/04 ,  H01S5/183

CPC classification number: H01S5/423 ,  F02P23/04 ,  H01S3/005 ,  H01S3/0606 ,  H01S3/061 ,  H01S3/0621 ,  H01S3/0627 ,  H01S3/094053 ,  H01S3/09415 ,  H01S3/11 ,  H01S3/1115 ,  H01S3/113 ,  H01S3/1611 ,  H01S3/1643 ,  H01S3/1685 ,  H01S5/026 ,  H01S5/0425 ,  H01S5/18313 ,  H01S5/18361 ,  H01S5/22 ,  H01S5/3202 ,  H01S5/34313 ,  H01S5/3432 ,  H01S5/34353 ,  H01S2301/176

Abstract: A surface-emitting laser array includes a plurality of light emitting parts. Each light emitting part includes a reflection mirror including aluminum gallium arsenide (AlxGa(1-x)As) where x is greater than 0.95 but less than or equal to 1; an active layer; and an electrode surrounding an emission region, from which laser light is emitted, the electrode covering a region between adjacent light emitting parts in the plurality of light emitting parts.

公开(公告)号：US09819141B2

公开(公告)日：2017-11-14

申请号：US15146675

申请日：2016-05-04

Applicant: IMRA America, Inc.

Inventor： Martin E. Fermann

IPC: H01S3/11 ,  H01S3/067 ,  H01S3/1055 ,  H01S3/106 ,  H01S3/107 ,  H01S3/13 ,  H01S3/16

CPC classification number: H01S3/1112 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/0675 ,  H01S3/1055 ,  H01S3/1067 ,  H01S3/107 ,  H01S3/1115 ,  H01S3/1307 ,  H01S3/161 ,  H01S3/1616 ,  H01S2301/085

Abstract: Examples of robust self-starting passively mode locked fiber oscillators are described. In certain implementations, the oscillators are configured as Fabry-Perot cavities containing an optical loop mirror on one cavity end and a bulk mirror or saturable absorber on the other end. The loop mirror can be further configured with an adjustable line phase delay to optimize modelocking. All intra-cavity fiber(s) can be polarization maintaining. Dispersion compensation components such as, e.g., dispersion compensation fibers, bulk diffraction gratings or fiber Bragg gratings may be included. The oscillators may include a bandpass filter to obtain high pulse energies when operating in the similariton regime. The oscillator output can be amplified and used whenever high power short pulses are required. For example the oscillators can be configured as frequency comb sources or supercontinuum sources. In conjunction with repetition rate modulation, applications include dual scanning delay lines and trace gas detection.

公开(公告)号：US09787051B2

公开(公告)日：2017-10-10

申请号：US14325721

申请日：2014-07-08

Applicant: Martin E. Fermann ,  Thomas R. Schibli ,  Ingmar Hartl

Inventor： Martin E. Fermann ,  Thomas R. Schibli ,  Ingmar Hartl

IPC: H01S3/10 ,  H01S3/11 ,  H01S3/08 ,  H01S3/105 ,  H01S3/067 ,  H01S3/16 ,  H01S3/00 ,  H01S3/17

CPC classification number: H01S3/1115 ,  H01S3/0092 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/08059 ,  H01S3/10046 ,  H01S3/105 ,  H01S3/1053 ,  H01S3/1118 ,  H01S3/1616 ,  H01S3/176

Abstract: Compact optical frequency sources are described. The comb source may include an intra-cavity optical element having a multi-material integrated structure with an electrically controllable active region. The active region may comprise a thin film. By way of example, the thin film and an insulating dielectric material disposed between two electrodes can provide for rapid loss modulation. In some embodiments the thin film may comprise graphene. In various embodiments of a frequency comb laser, rapid modulation of the CEO frequency can be implemented via electric modulation of the transmission or reflection loss of an additional optical element, which can be the saturable absorber itself. In another embodiment, the thin film can also be used as a saturable absorber in order to facilitate passive modelocking. In some implementations the optical element may be formed on a cleaved or polished end of an optical fiber.

公开(公告)号：US20170271838A9

公开(公告)日：2017-09-21

申请号：US13958703

申请日：2013-08-05

Applicant: IMRA AMERICA, INC.

Inventor： Martin E. FERMANN

IPC: H01S3/11

CPC classification number: H01S3/1115 ,  H01S3/0057 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094019 ,  H01S3/094042 ,  H01S3/109 ,  H01S3/1112 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/302

Abstract: A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Peak power handling capability of fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive pulse stretching in the presence of self-phase modulation and gain results in the formation of high-power parabolic pulses. To ensure a wide tunability of the whole system, Raman-shifting of the compact sources of ultrashort pulses in conjunction with frequency-conversion in nonlinear optical crystals can be implemented, or an Anti-Stokes fiber in conjunction with fiber amplifiers and Raman-shifters are used. Positive dispersion optical amplifiers are used to improve transmission characteristics. An optical communication system utilizes a Raman amplifier fiber pumped by a train of Raman-shifted, wavelength-tunable pump pulses, to thereby amplify an optical signal which counterpropagates within the Raman amplifier fiber with respect to the pump pulses.

公开(公告)号：US09711932B2

公开(公告)日：2017-07-18

申请号：US14847139

申请日：2015-09-08

Applicant: IMRA AMERICA, INC.

Inventor： Martin Fermann ,  Ingmar Hartl ,  Axel Ruehl

IPC: H01S3/11 ,  G01J3/45 ,  G01N21/31 ,  G01N21/3581 ,  G01N21/47 ,  G01N21/63 ,  G01N21/65 ,  H01S3/067 ,  G01J3/10 ,  G01N21/35 ,  H01S3/105 ,  H01S3/106 ,  H01S3/107

CPC classification number: H01S3/1106 ,  G01J3/10 ,  G01J3/45 ,  G01J2003/102 ,  G01N21/31 ,  G01N21/3581 ,  G01N21/4795 ,  G01N21/636 ,  G01N21/65 ,  G01N2021/3595 ,  H01S3/067 ,  H01S3/105 ,  H01S3/1068 ,  H01S3/107 ,  H01S3/1115

Abstract: The invention relates to scanning pulsed laser systems for optical imaging. Coherent dual scanning laser systems (CDSL) are disclosed and some applications thereof. Various alternatives for implementation are illustrated. In at least one embodiment a coherent dual scanning laser system (CDSL) includes two passively modelocked fiber oscillators. In some embodiments an effective CDSL is constructed with only one laser. At least one embodiment includes a coherent scanning laser system (CSL) for generating pulse pairs with a time varying time delay. A CDSL, effective CDSL, or CSL may be arranged in an imaging system for one or more of optical imaging, microscopy, micro-spectroscopy and/or THz imaging.