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17 条记录 (耗时 0.039 秒)

    SELF-CLEANING OF OPTICAL SURFACES IN LOW-PRESSURE REACTIVE GAS ENVIRONMENTS IN ADVANCED OPTICAL SYSTEMS
    11.
    发明申请
    SELF-CLEANING OF OPTICAL SURFACES IN LOW-PRESSURE REACTIVE GAS ENVIRONMENTS IN ADVANCED OPTICAL SYSTEMS 审中-公开
    高级光学系统低压反应气体环境中的光表面自清洁

    公开(公告)号：US20120113513A1

    公开(公告)日：2012-05-10

    申请号：US13279257

    申请日：2011-10-22

    申请人： Xiaoshi Zhang ,  Henry C. Kapteyn

    发明人： Xiaoshi Zhang ,  Henry C. Kapteyn

    IPC分类号： G02B23/16

    CPC分类号： H01S3/027 ,  H01S3/0007 ,  H01S3/042

    摘要： Apparatus and methods for self-cleaning of optical elements in sealed environments over a wide range of operating optical frequencies prevent long-term power degradation by introducing low-pressure backfill of a reactive gas such as oxygen into a vacuum chamber containing the optical elements. The backfill pressure is preferably between 10−4 torr and 10 torr, and generally between 0.1 torr and 2 torr at room temperature. The vacuum chamber may be continuously evacuated and backfilled, or may be sealed after evacuation and backfill is performed.

    摘要翻译： 在宽范围的操作光频率下在密封环境中自动清洁光学元件的装置和方法通过将诸如氧的反应气体的低压回填引入到包含光学元件的真空室中来防止长期的功率降低。 回填压力优选在10-4托和10托之间，并且在室温下通常在0.1托和2托之间。 真空室可以被连续排空和回填，或者可以在排空和回填之后进行密封。

    Guided wave methods and apparatus for nonlinear frequency generation
    13.
    发明授权
    Guided wave methods and apparatus for nonlinear frequency generation 失效
    用于非线性频率发生的导波方法和装置

    公开(公告)号：US6151155A

    公开(公告)日：2000-11-21

    申请号：US124563

    申请日：1998-07-29

    申请人： Charles G. Durfee, III ,  Andrew Rundquist ,  Henry C. Kapteyn ,  Margaret M. Murnane

    发明人： Charles G. Durfee, III ,  Andrew Rundquist ,  Henry C. Kapteyn ,  Margaret M. Murnane

    IPC分类号： G02F1/35 ,  G02F1/365

    CPC分类号： G02F1/365 ,  G02F1/3544

    摘要： Methods and apparatus are disclosed for the nonlinear generation of sum and difference frequencies of electromagnetic radiation propagating in a nonlinear material. A waveguide having a waveguide cavity contains the nonlinear material. Phase matching of the nonlinear generation is obtained by adjusting a waveguide propagation constant, the refractive index of the nonlinear material, or the waveguide mode in which the radiation propagates. Phase matching can be achieved even in isotropic nonlinear materials. A short-wavelength radiation source uses phase-matched nonlinear generation in a waveguide to produce high harmonics of a pulsed laser.

    摘要翻译： 公开了用于在非线性材料中传播的电磁辐射的和频差的非线性生成的方法和装置。 具有波导腔的波导包含非线性材料。 通过调整波导传播常数，非线性材料的折射率或辐射传播的波导模式，获得非线性生成的相位匹配。 即使在各向同性非线性材料中也可以实现相位匹配。 短波长辐射源在波导中使用相位匹配的非线性生成来产生脉冲激光器的高次谐波。

    Laser amplifier and method
    14.
    发明授权
    Laser amplifier and method 失效
    激光放大器和方法

    公开(公告)号：US5644424A

    公开(公告)日：1997-07-01

    申请号：US619275

    申请日：1996-03-18

    申请人： Sterling Backus ,  Henry C. Kapteyn ,  Margaret M. Murnane

    发明人： Sterling Backus ,  Henry C. Kapteyn ,  Margaret M. Murnane

    IPC分类号： H01S3/23 ,  H01S3/00

    CPC分类号： H01S3/2325 ,  H01S3/0057

    摘要： Laser amplifiers and methods for amplifying a laser beam are disclosed. A representative embodiment of the amplifier comprises first and second curved mirrors, a gain medium, a third mirror, and a mask. The gain medium is situated between the first and second curved mirrors at the focal point of each curved mirror. The first curved mirror directs and focuses a laser beam to pass through the gain medium to the second curved mirror which reflects and recollimates the laser beam. The gain medium amplifies and shapes the laser beam as the laser beam passes therethough. The third mirror reflects the laser beam, reflected from the second curved mirror, so that the laser beam bypasses the gain medium and return to the first curved mirror, thereby completing a cycle of a ring traversed by the laser beam. The mask defines at least one beam-clipping aperture through which the laser beam passes during a cycle. The gain medium is pumped, preferably using a suitable pumping laser. The laser amplifier can be used to increase the energy of continuous-wave or, especially, pulsed laser beams including pulses of femtosecond duration and relatively high pulse rate.

    摘要翻译： 公开了用于放大激光束的激光放大器和方法。 放大器的代表性实施例包括第一和第二曲面镜，增益介质，第三镜和掩模。 增益介质位于每个弯曲镜的焦点处的第一和第二曲面镜之间。 第一曲面镜引导和聚焦激光束以将增益介质传递到第二曲面镜，该反射镜反射并重新校准激光束。 当激光束通过时，增益介质放大并成形激光束。 第三反射镜反射从第二弯曲镜反射的激光束，使得激光束绕过增益介质并返回到第一弯曲镜，从而完成由激光束穿过的环的周期。 掩模限定了至少一个光束剪切孔径，激光束在一个周期期间通过该孔径。 增益介质被泵送，优选地使用合适的泵浦激光器。 激光放大器可用于增加连续波的能量，特别是脉冲激光束，包括飞秒持续时间脉冲和相对较高的脉冲速率。

    Multistage synchronization of pulsed radiation sources
    17.
    发明授权
    Multistage synchronization of pulsed radiation sources 失效
    脉冲辐射源的多级同步

    公开(公告)号：US06831935B2

    公开(公告)日：2004-12-14

    申请号：US10109999

    申请日：2002-03-29

    申请人： Jun Ye ,  Henry C. Kapteyn ,  John L. Hall ,  Robert K. Shelton ,  Margaret Murnane ,  Long-Sheng Ma

    发明人： Jun Ye ,  Henry C. Kapteyn ,  John L. Hall ,  Robert K. Shelton ,  Margaret Murnane ,  Long-Sheng Ma

    IPC分类号： H01S3098

    CPC分类号： H01S3/1109 ,  H01S3/094061 ,  H01S3/1394 ,  H01S3/2383 ,  H05G2/00

    摘要： Accurate and efficient synchronization of two pulsed radiation sources (e.g. iwo mode locked lasers) is accomplished in stages. Rough synchronization is accomplished by synchronizing (for example) the fundamental repetition rate of the two lasers. Fine synchronization is accomplished by synchronizing high harmonics of the two lasers. More accurate synchronization may be accomplished by adding more stages, by utilizing light out of a nonlinear laser in which the two beams are crossed, or by utilizing heterodyne beats of the two laser beams. A dc offset signal may added to the control signal generated by the synchronization stages.

    摘要翻译： 两个脉冲辐射源（例如两个模式锁定激光器）的准确和有效的同步分阶段完成。 通过同步（例如）两个激光器的基本重复率来实现粗略同步。 通过同步两个激光器的高次谐波来实现精细同步。 可以通过使用两个光束交叉的非线性激光器中的光或者通过利用两个激光束的外差拍子来添加更多级来实现更准确的同步。 直流偏移信号可以被添加到由同步级产生的控制信号。