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196 条记录 (耗时 0.024 秒)

    Optical wavelength converting system and wavelength stabilised laser
    91.
    发明公开
    Optical wavelength converting system and wavelength stabilised laser 有权
    OptischesWellenlängenumwandlungssystemundwellenlängenstabilisierterLaser

    公开(公告)号：EP1096307A2

    公开(公告)日：2001-05-02

    申请号：EP00123238.8

    申请日：2000-10-26

    申请人： FUJI PHOTO FILM CO., LTD.

    发明人： Sonoda, Shinichiro, c/o Fuji Photo Film Co.,Ltd ,  Miura, Hideo, c/o Fuji Photo Film Co.,Ltd ,  Hatori, Masami, c/o Fuji Photo Film Co.,Ltd

    IPC分类号： G02F1/377 ,  H01S5/068

    CPC分类号： G02F1/3544 ,  G02F1/377 ,  G02F1/3775 ,  G02F2001/3505 ,  G02F2001/3509 ,  G02F2001/3548 ,  H01S3/1062 ,  H01S5/0092 ,  H01S5/02248 ,  H01S5/02284 ,  H01S5/02438 ,  H01S5/141

    摘要： A light wavelength converting element which can reduce an amount of light fed-back to a semiconductor laser. The light wavelength converting element converts a wavelength of a fundamental wave which enters from a first end surface side of an optical waveguide to thereby emit a converted wavelength wave from a second end surface side thereof. The second end surface is inclined with respect to the side surface of the optical waveguide. Also provided is a wavelength stabilized laser having a semiconductor laser, a device which feeds a laser beam emitted from the semiconductor laser back to the semiconductor laser, and a band-pass filter. An optical length between the semiconductor laser and the device is made to be longer than a coherent length of the semiconductor laser, thus improving linearity of a current vs. light output characteristic. Further, a light wavelength converting unit and a light wavelength converting module are provided in which, since an LD-SHG unit formed by a semiconductor laser and a light wavelength converting element is hermetically sealed in a package, the LD-SHG unit can be manufactured easily and has excellent stability over time.

    摘要翻译： 一种光波长转换元件，其可以减少反馈到半导体激光器的光量。 光波长转换元件转换从光波导的第一端面侧入射的基波的波长，从而从其第二端面侧发射转换的波长波。 第二端面相对于光波导的侧面倾斜。 还提供了具有半导体激光器的波长稳定激光器，将从半导体激光器发射的激光束反馈回半导体激光器的装置和带通滤波器。 使半导体激光器和器件之间的光学长度比半导体激光器的相干长度长，从而提高电流对光输出特性的线性度。 此外，提供了一种光波长转换单元和光波长转换模块，其中，由半导体激光器形成的LD-SHG单元和光波长转换元件气密地封装在封装中，因此可以制造LD-SHG单元 容易，随着时间的推移具有极好的稳定性。

    Multi quasi phase matched interactions in a non-linear crystal
    94.
    发明公开
    Multi quasi phase matched interactions in a non-linear crystal 失效
    在非线性晶体的多个准相位匹配的相互作用

    公开(公告)号：EP0788015A3

    公开(公告)日：1999-03-24

    申请号：EP97300595.2

    申请日：1997-01-30

    申请人： LIGHTWAVE ELECTRONICS CORP.

    发明人： Wallace, Richard W. ,  Bosenberg, Walter R. ,  Alexander, Jason I.

    IPC分类号： G02F1/35 ,  G02F1/39

    CPC分类号： G02F1/3532 ,  G02F1/39 ,  G02F2001/3548 ,  H01S3/08086

    摘要： A laser system in which an intense laser beam of a predefined pumping wavelength traverses a non-linear material, such as crystalline lithium niobate, that has been impressed with one or more quasi phase matching (QPM) gratings is disclosed. Quasi phase matching compensates for the dispersion or birefringence in a non-linear material by modulating the non-linearity with the proper period such that the different wavelengths involved in the non-linear process stay in phase over a long interaction length. The first QPM grating promotes the parametric generation of a resonant signal whose wavelength is determined by the grating period. According to the invention, either a second QPM grating impressed in the same medium or a different order of the first QPM grating promotes the non-linear interaction between the resonant signal and another optical signal traversing the non-linear material. The multi-step process allows efficient generation of high-intensity signals in wavelength regions, such as the blue, not easily accessible otherwise.

    Optical wavelength converting device for second harmonic generation
    95.
    发明公开
    Optical wavelength converting device for second harmonic generation 失效
    chen chen chen chen chen chen chen chen chen chen chen chen chen chen chen chen chen

    公开(公告)号：EP0844511A2

    公开(公告)日：1998-05-27

    申请号：EP98102389.8

    申请日：1993-10-07

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Mizuuchi, Kiminori ,  Yamamoto, Kazuhisa

    IPC分类号： G02F1/37 ,  G02F1/35

    CPC分类号： G02F1/3558 ,  G02F1/03 ,  G02F1/3775 ,  G02F2001/3546 ,  G02F2001/3548 ,  G02F2201/346 ,  G02F2202/20 ,  Y10T29/49016

    摘要： An optical wavelength converting device is provided with a LiTaO 3 substrate, a plurality of inverted-polarization layers periodically arranged in an upper surface of the LiTaO 3 substrate, and an optical waveguide crossing the inverted-polarization layers. The upper surface of the LiTaO 3 substrate is directed toward a -X-crystal axis direction. The inverted-polarization layers are formed by exchanging Ta + ions of the LiTaO 3 substrate for H + ions. The substrate is formed by cutting out LiTaO 3 crystal along a plane inclined to the C-crystal axis towards the X-crystal axis. The spontaneous polarization is directed in a +C-crystal axis direction. The optical waveguide is formed by exchanging Ta + ions of the LiTaO 3 substrate and the inverted-polarization layers for H + ions to set a refractive index of the optical waveguide higher than that of the LiTaO 3 substrate. The optical waveguide extends in a -Y-crystal axis direction. Fundamental waves polarized in a transverse electric mode induce electric field directed in ±Y-crystal axis directions and are converted into second harmonic waves in the optical waveguide.

    摘要翻译： 光波长转换装置设置有LiTaO 3衬底，周期性地布置在LiTaO 3衬底的上表面中的多个倒置极化层和与反极化层交叉的光波导。 LiTaO3基板的上表面朝向-X晶轴方向。 通过将LiTaO 3衬底的Ta +离子交换为H +离子而形成反向偏振层。 通过沿着与C晶轴倾斜的平面朝向X晶轴切割LiTaO 3晶体来形成衬底。 自发极化指向+ C晶轴方向。 通过交换LiTaO3衬底的Ta +和H +离子的反向偏振层来形成光波导，以使光波导的折射率高于LiTaO 3衬底的折射率。 光波导沿-Y轴方向延伸。 在横向电模式中极化的基波感应在+/- Y晶轴方向上引导的电场，并在光波导中转换成二次谐波。

    Wavelength-conversion laser having nonlinear optical crystal which effects type-I phase-matching
    98.
    发明公开
    Wavelength-conversion laser having nonlinear optical crystal which effects type-I phase-matching 失效
    波长转换激光与I型phasenangepasstem，非线性晶体

    公开(公告)号：EP0712184A3

    公开(公告)日：1997-10-22

    申请号：EP95109139.6

    申请日：1995-06-13

    申请人： FUJI PHOTO FILM CO., LTD.

    发明人： Hyuga, Hiroaki, c/o Fuji Photo Film Co., Ltd.

    IPC分类号： H01S3/109

    CPC分类号： H01S3/109 ,  G02F2001/3548 ,  H01S3/1673

    摘要： A wavelength-conversion laser capable of maintaining a single longitudinal mode even when the temperature of a resonator changes. The wavelength-conversion laser is made up of a solid-state laser crystal doped with Neodymium which is pumped by light, a nonlinear optical crystal disposed in a resonator for converting the wavelength of a solid-state laser beam emanated from the solid-state laser crystal, and an etalon disposed in the resonator for realizing a single longitudinal mode. The nonlinear optical crystal is a crystal, which effects type-I phase-matching, such as MgO:LiNbO₃ crystal. Moreover, the nonlinear optical crystal possesses periodic domain reversals.

    TUNABLE BLUE LASER DIODE
    99.
    发明公开
    TUNABLE BLUE LASER DIODE 失效
    ABSTIMMBARE BLAUE LASERDIODE

    公开(公告)号：EP0784881A4

    公开(公告)日：1997-09-17

    申请号：EP95914775

    申请日：1995-03-21

    申请人： SDL INC

    发明人： NAM DEREK W ,  WELCH DAVID F ,  WAARTS ROBERT G

    IPC分类号： G02F1/37 ,  G02F1/35 ,  G02F1/377 ,  H01S3/067 ,  H01S5/00 ,  H01S5/022 ,  H01S5/024 ,  H01S5/06 ,  H01S5/0687 ,  H01S5/12 ,  H01S5/125 ,  H01S3/10

    CPC分类号： H01S5/02415 ,  G02F1/377 ,  G02F2001/3548 ,  H01S3/0092 ,  H01S3/06754 ,  H01S3/09415 ,  H01S3/2375 ,  H01S5/0092 ,  H01S5/02248 ,  H01S5/02446 ,  H01S5/0612 ,  H01S5/06256 ,  H01S5/0687 ,  H01S5/4087

    摘要： A laser system which features a distributed Bragg reflector (DBR) or a distributed feedback (DFB) tunable laser (11) coupled to a quasi-phasematched (QPM) waveguide (31; 16) of nonlinear material (13). The DBR laser is tuned either thermally (14; 51, 53) or via current injection (Itune), or both, converting the output of a red laser into blue. Thermal tuning provides coarse adjustment while injection current tuning provides fine adjustment. Intensity modulation or pulsed output may be provided by application of a modulation signal (Imod) to the DBR laser. Another embodiment provides frequency modulation (Vfsk) of the laser. In yet another embodiment, a high power laser (103) pumped fiber amplifier (101) is disposed between the laser (11) and the waveguide (16).

    摘要翻译： 一种激光系统，其特征在于耦合到非线性材料（13）的准相位匹配（QPM）波导（31; 16）的分布式布拉格反射器（DBR）或分布式反馈（DFB）可调谐激光器（11）。 DBR激光器通过热（14; 51,53）或通过电流注入（Itune）或两者进行调谐，将红色激光的输出转换为蓝色。 热调谐提供粗调，而注入电流调谐提供精细调整。 强度调制或脉冲输出可以通过将调制信号（Imod）施加到DBR激光器来提供。 另一个实施例提供激光器的频率调制（Vfsk）。 在又一个实施例中，高功率激光器（103）泵浦光纤放大器（101）设置在激光器（11）和波导（16）之间。