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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
IPC分类号: G02F1/03 , G02F1/13 , G02F1/1335 , G02F1/31
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。