Apparatus for accomplishing spectral line selection in lasers by
retroreflective feedback
    5.
    发明授权
    Apparatus for accomplishing spectral line selection in lasers by retroreflective feedback 失效
    用于通过回射反馈在激光器中实现光谱线选择的装置

    公开(公告)号:US4216439A

    公开(公告)日:1980-08-05

    申请号:US903762

    申请日:1978-05-08

    IPC分类号: H01S3/081 H01S3/08

    CPC分类号: H01S3/0812

    摘要: In one application, the apparatus is used with unstable laser resonators which include a gain region defined by a concave mirror and a convex mirror. The apparatus includes a spectral line selection medium, such as a multiple band pass filter or a multiple diffraction grating, which is located so that the laser beam directed out of the laser gain region impinges thereon. A retroreflector is positioned so that the spectral lines selected by the line selection medium are reflected back into the laser gain region along the propagation path of the incident beam, resulting in a lockup of the laser at the selected spectral lines.

    摘要翻译: 在一个应用中,该装置用于包括由凹面镜和凸面镜定义的增益区域的不稳定激光谐振器。 该装置包括频谱选择介质,例如多通带滤波器或多重衍射光栅,其被定位成使得被引导出激光增益区域的激光束在其上射出。 定向后向反射器使得由线选择介质选择的光谱线沿着入射光束的传播路径反射回激光增益区域,导致激光在所选光谱线处的锁定。