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    NON-COLLINEARLY PHASE-MATCHED FREQUENCY MIXING
    2.
    发明公开
    NON-COLLINEARLY PHASE-MATCHED FREQUENCY MIXING 审中-公开

    公开(公告)号：US20240146017A1

    公开(公告)日：2024-05-02

    申请号：US17975475

    申请日：2022-10-27

    Applicant: Coherent LaserSystems GMBH & Co. KG

    Inventor： Christian HAGEMANN ,  Jens SCHÜTTLER

    IPC: H01S3/109

    CPC classification number: H01S3/109

    Abstract: A laser apparatus with non-collinearly phase-matched frequency mixing includes a nonlinear crystal generating an output laser beam from non-collinearly phase-matched frequency mixing of first and second input laser beams. The output laser beam is subject to walk-off in a walk-off plane. The second input laser beam is less powerful than the first input laser beam. The first input laser beam is directed to more closely align its Poynting vector to the output beam Poynting vector than in collinear phase matching. To achieve good spatial overlap in this phase matching scheme, the second input laser beam is elongated in the walk-off plane, such that the second input laser beam has a greater transverse size than the first input laser beam in the walk-off plane. This non-collinear phase matching scheme is capable of achieving an improved beam quality of the output beam, as compared to collinear phase matching with circular input beams.

    Apparatus of optical transmitters and receivers operating in long wave infrared wavelength ranges
    6.
    发明授权
    Apparatus of optical transmitters and receivers operating in long wave infrared wavelength ranges 有权

    公开(公告)号：US11841599B2

    公开(公告)日：2023-12-12

    申请号：US17451711

    申请日：2021-10-21

    Applicant: McMaster University

    Inventor： Chang-qing Xu ,  Liam Flannigan ,  Joshua Kneller

    IPC: G02F1/39 ,  G02F1/35 ,  H01S3/109 ,  H01S3/108

    CPC classification number: G02F1/39 ,  G02F1/3534 ,  G02F1/3548 ,  H01S3/109 ,  H01S3/1083

    Abstract: Optical transmitters and optical receivers utilizing long wave infrared light for use with an earth-orbiting satellite communication system, and a structure including an intracavity optical nonlinear process, are described herein. The transmitters include a pumping laser diode with a fast-axis collimating lens and a pumping wavelength λ0, operating in a continuous wavelength (CW) mode. The transmitters also include a laser cavity having a beam combiner or a dichroic mirror, a laser crystal with a lasing wavelength λ1 and a difference frequency generation orientation patterned semiconductor to generate long wave-IR light. The transmitters also include a second laser at a wavelength λ2, operating in a modulation mode. The receivers have a similar structure to the transmitters, utilizing a sum frequency generation orientation patterned semiconductor to convert long wave-IR light into the short wave-IR.

    METHOD TO GENERATE COHERENT ULTRAVIOLET RADIATION FROM LASER BEAMS
    8.
    发明公开
    METHOD TO GENERATE COHERENT ULTRAVIOLET RADIATION FROM LASER BEAMS 审中-公开

    公开(公告)号：US20230344188A1

    公开(公告)日：2023-10-26

    申请号：US18026976

    申请日：2021-09-18

    Applicant: UVL A/S

    Inventor： Emil Zanchetta Ulsig ,  Nicolas Volet ,  Peter Johansen

    IPC: H01S3/109 ,  H01S3/0941 ,  H01S3/094

    CPC classification number: H01S3/109 ,  H01S3/0941 ,  H01S3/094096

    Abstract: A laser source device including a pump laser system, a combinator, and nonlinear frequency generation module. The pump laser system is made of one of more laser diodes, each of which generates one or more light beams whose wavelengths are in the visible spectral range having a wavelength in the range 380 nm to 740 nm. The combinator allows passing of the light beams from the pump laser system and combines them and couples them to the next module. The nonlinear frequency generation module allows passing of the light beams and, while passing through, employs nonlinear optical phenomenon of sum-frequency generation for providing a UVC light beam.

    Intracavity harmonic generation with layered nonlinear optic
    9.
    发明公开
    Intracavity harmonic generation with layered nonlinear optic 审中-公开

    公开(公告)号：US20230335969A1

    公开(公告)日：2023-10-19

    申请号：US17905831

    申请日：2022-08-24

    Applicant: Pavilion Integration Corporation

    Inventor： Haiwen Wang ,  Jihchuang Robin Huang ,  Ningyi Luo

    IPC: H01S3/109 ,  G02F1/37 ,  G02F1/355

    CPC classification number: H01S3/109 ,  G02F1/37 ,  G02F1/3551 ,  G02F1/355

    Abstract: This invention proposes to use a specially designed layered nonlinear optic (LNO) for intracavity harmonic generation. The LNO generates the harmonic and guides the generated harmonic beam to a different path from the fundamental beam path with total internal reflection, a phenomenon that all lights are reflected when lights in one (“internal”) optic strike sufficiently obliquely against the interface with a second (“external”) optic, in which the refractive index is lower than that in the internal optic. No coating is necessary for the harmonic inside the fundamental beam laser cavity. The generated harmonic beam does not travel through any surface inside the fundamental beam cavity, either. Hence this invention improves the reliability of intracavity harmonic generation laser especially if the harmonic is in the UV range.

    SOLID-STATE LASER SYSTEM, PHASE MATCHING METHOD, AND ELECTRONIC DEVICE MANUFACTURING METHOD
    10.
    发明公开
    SOLID-STATE LASER SYSTEM, PHASE MATCHING METHOD, AND ELECTRONIC DEVICE MANUFACTURING METHOD 审中-公开

    公开(公告)号：US20230178957A1

    公开(公告)日：2023-06-08

    申请号：US18164376

    申请日：2023-02-03

    Applicant: Gigaphoton Inc.

    Inventor： Yohei TANAKA ,  Chen QU

    IPC: H01S3/109 ,  G02F1/37 ,  H01S3/00 ,  G02F1/35 ,  H01S3/02

    CPC classification number: H01S3/109 ,  G02F1/37 ,  H01S3/0092 ,  G02F1/3544 ,  H01S3/025

    Abstract: A solid-state laser system according to an aspect of the present disclosure includes a first non-linear crystal that generates first wavelength-converted light based on a first laser beam, a first adjustment unit configured to perform phase matching of the first wavelength-converted light in the first non-linear crystal, a second non-linear crystal that generates second wavelength-converted light based on a second laser beam and the first wavelength-converted light, a second adjustment unit configured to perform phase matching of the second wavelength-converted light in the second non-linear crystal, a light detection unit configured to detect light having a selected wavelength, and a processor configured to control the first adjustment unit based on intensity of at least one of the first wavelength-converted light and the first laser beam and to control the second adjustment unit based on intensity of at least one of the second wavelength-converted light and the first wavelength-converted light.

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