Optical switch attenuator
    21.
    发明授权
    Optical switch attenuator 失效
    光开关衰减器

    公开(公告)号:US4410238A

    公开(公告)日:1983-10-18

    申请号:US298986

    申请日:1981-09-03

    申请人: Eric G. Hanson

    发明人: Eric G. Hanson

    CPC分类号: G02F1/31 Y10S359/90

    摘要: An optical switch having low insertion loss and low crosstalk is provided by two slabs of birefringent material having a polarization rotator as a control element interposed therebetween. By controlling the polarization rotator electrically, a selectable ratio of transmitted-to-displaced output optical power is realized. The optical switch therefore can function as an attenuator to a light beam traversing through it. In the preferred embodiment calcite crystals are used for the slabs, and a liquid crystal cell for the polarization rotator.

    摘要翻译: 具有低插入损耗和低串扰的光开关由两片双折射材料提供,它们具有作为控制元件的偏振旋转器。 通过电气控制偏振旋转器,可以实现传输到位移输出光功率的可选择比率。 因此,光开关可以用作穿过其的光束的衰减器。 在优选实施例中,方解石晶体用于板坯,以及用于偏振旋转器的液晶单元。