公开(公告)号：US4156209A

公开(公告)日：1979-05-22

申请号：US797535

申请日：1977-05-16

申请人： Richard L. Herbst ,  Robert L. Mortensen

发明人： Richard L. Herbst ,  Robert L. Mortensen

IPC分类号： H01S3/08 ,  H01S3/00

CPC分类号： H01S3/08081

摘要： A meniscus lens is disclosed for use in high power light beam applications, such as in the optics of a high power laser where the laser beam intensity is in excess of one megawatt per square centimeter. The meniscus lens is designed such that light rays reflected from the lens are divergent so that no back focal points are created by the lens. In this manner, undesired dielectric breakdowns and damage to optical components and the like are avoided due to reflected back focal points. In one embodiment of the present invention, the output mirror of a high power laser is deposited upon the convex face of a meniscus lens, such lens being designed to avoid back focal points, whereby the construction of the output mirror is greatly simplified.

摘要翻译： 公开了用于高功率光束应用的弯月透镜，例如在激光束强度超过1兆瓦每平方厘米的大功率激光器的光学器件中。 弯月透镜被设计成使得从透镜反射的光线发散，使得透镜不产生后焦点。 以这种方式，由于反射的焦点，避免了不期望的电介质击穿和对光学部件等的损坏。 在本发明的一个实施例中，大功率激光器的输出反射镜沉积在弯月透镜的凸面上，该透镜被设计成避免后焦点，从而大大简化了输出反射镜的结构。

公开(公告)号：US4909612A

公开(公告)日：1990-03-20

申请号：US885249

申请日：1986-07-14

申请人： David G. Scerbak ,  John Dutcher ,  Robert L. Mortensen ,  Richard W. Wallace ,  William M. Grossman

发明人： David G. Scerbak ,  John Dutcher ,  Robert L. Mortensen ,  Richard W. Wallace ,  William M. Grossman

IPC分类号： G02F1/09

CPC分类号： G02F1/093

摘要： An optical Faraday isolator includes a slab of Faraday rotator medium coated to define input and output faces and internal reflective surfaces for causing the beam to travel between the input and output faces along a zig-zag path. Permanent magnets polarized in a direction normal to the plane defined by the zig-zag beam path are disposed on opposite sides of the beam path. The magnets are paired on each side with serially alternating polarity and the like poles are in transverse registration on opposite sides of the beam path to produce an intense, unidirectional magnetic field parallel to the beam path within the rotator slab. A quarterwave plate introduces a compensating amount of elliptical polarization to cancel unwanted elliptical polarization effects of the slab and its coatings. A beam shaving aperture at the exit of the slab shaves off divergent backward travelling rays.

摘要翻译： 光学法拉第隔离器包括法拉第转子介质的平板，其被涂覆以限定输入和输出面以及内部反射表面，用于使光束沿着之字形路径在输入和输出面之间行进。 在垂直于由锯齿形光束路径限定的平面的方向上极化的永磁体设置在光束路径的相对侧上。 磁体在每一侧配对，具有串联交替的极性，并且类似的磁极在光束路径的相对侧上横向配准，以产生平行于旋转板内的光束路径的强烈的单向磁场。 四分之一波片引入补偿量的椭圆极化以消除板坯及其涂层的不需要的椭圆偏振效应。 在平板出口处的光束剃须孔可以消除发散的反向行进光线。