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    Tunable pulse width laser
    1.
    再颁专利
    Tunable pulse width laser 有权

    公开(公告)号：USRE50026E1

    公开(公告)日：2024-06-25

    申请号：US16741186

    申请日：2020-01-13

    申请人： NKT Photonics A/S

    发明人： Paulo Almeida ,  John Redvers Clowes ,  Pascal Dupriez ,  Anatoly Borisovich Grudinin

    IPC分类号： H01S3/10 ,  H01S3/067 ,  H01S3/1112 ,  H01S3/13 ,  H01S3/00 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/23

    CPC分类号： H01S3/06754 ,  H01S3/1112 ,  H01S3/0057 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/1618 ,  H01S3/2383 ,  H01S2301/08

    摘要： A method of tuning the time duration of laser output pulses, the method including spectrally dispersing optical pulses and further comprising providing an optical pulse having a time duration and a spectral bandwidth; spectrally dispersing (243, 245) the optical pulse so as to provide a selected change in the time duration of the pulse responsive to the spectral bandwidth of the pulse; outputting (226) an optical output pulse having a first time duration that is responsive to the selected change in time duration; providing another optical pulse; changing the amount of spectral bandwidth of the another optical pulse (272) to be different than that of the optical pulse or changing the amount of spectral dispersion so that spectrally dispersing the another optical pulse provides a change in time duration that is different than the selected change; and outputting (226) another optical output pulse having a second time duration that is responsive to the different change in time duration, the second time duration of the another optical output pulse being different than the first time duration of the optical output pulse.

    MODE-LOCKABLE RING OSCILLATOR AND ASSOCIATED METHODS
    3.
    发明公开
    MODE-LOCKABLE RING OSCILLATOR AND ASSOCIATED METHODS 审中-公开

    公开(公告)号：US20230223729A1

    公开(公告)日：2023-07-13

    申请号：US18094268

    申请日：2023-01-06

    申请人： Cornell University

    发明人： Henry HAIG ,  Pavel SIDORENKO ,  Frank WISE

    IPC分类号： H01S3/00 ,  H01S3/067 ,  H01S3/10 ,  H01S3/1112 ,  H01S3/094

    CPC分类号： H01S3/0057 ,  H01S3/06791 ,  H01S3/06716 ,  H01S3/10023 ,  H01S3/1112 ,  H01S3/094003

    摘要： A mode-lockable ring oscillator includes a gain element for amplifying an optical pulse into an amplified pulse, a nonlinear optical element for broadening the amplified pulse into a first spectrally-broadened pulse, a first optical filter for filtering the first spectrally-broadened pulse into a first filtered pulse, a passive nonlinear optical element for broadening the first filtered pulse into a second spectrally-broadened pulse, and a second optical filter for filtering the second spectrally-broadened pulse into a second filtered pulse. The first and second optical filters have passbands that partially overlap such that the ring cavity can lase CW. With these spectrally overlapping passbands, the mode-lockable ring oscillator can directly initiate single-pulse mode-locking by modulating pump power that pumps the gain element. After this modulation has stopped, the mode-lockable ring oscillator maintains this single-pulse mode-locking while the passbands remain spectrally overlapped.

    FIBER LASER SYSTEM
    4.
    发明公开
    FIBER LASER SYSTEM 审中-公开

    公开(公告)号：US20230163553A1

    公开(公告)日：2023-05-25

    申请号：US17919553

    申请日：2021-04-21

    申请人： UNIVERSITÉ LAVAL ,  CEGEP GARNEAU

    发明人： Vincent BOULANGER ,  Michel PICHÉ ,  Martin BERNIER ,  Michel OLIVIER

    IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/1112

    CPC分类号： H01S3/0675 ,  H01S3/094003 ,  H01S3/09415 ,  H01S3/1112 ,  H01S3/06791

    摘要： There is described a fiber laser system generally having a pump laser generating a pump laser beam; and a length of optical fiber optically coupled to the pump laser, the length of optical fiber having: a laser cavity having a cavity path, a first fiber Bragg grating having a first reflectivity profile, a second filter having a second filter profile, and an optical gain region between the first fiber Bragg grating and the second filter along the cavity path, the first reflectivity profile being spectrally detuned from the second filter profile, the first fiber Bragg grating having a first refractive index profile comprising a full width at half maximum bandwidth of at least 0.2 nm and a Gaussian-like apodization, wherein, upon pumping of the optical gain region with the pump laser beam and mode locking of the laser cavity, optical pulses are circulated along the cavity path; and an output.