Tuneable and switchable liquid crystal laser protection system.
Tuneable and switchable liquid crystal laser protection system.
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DOI：
10.1364/ao.56.008061
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发表时间：
2017-10
期刊：
影响因子：
1.9
通讯作者：
Ethan I. L. Jull;H. Gleeson
中科院分区：
文献类型：
--
作者：
Ethan I. L. Jull;H. Gleeson
使用液晶Lyot滤波器作为一个简单而紧凑的可切换激光保护系统进行了演示。系统的OFF状态表现出波长无关的传输，并切换到ON状态，拒绝选定的波长。根据拒绝波长的不同，可切换系统的响应时间小于110 ms，当使用低阶拒绝波段时，可以实现小于5 ms的快速切换。抑制调谐范围在480 ~ 640 nm之间，并讨论了在可见光谱外工作的潜力。在ON状态下，被拒绝波长处的传输受到偏振片消光比的有效限制，而在其他波长处的传输即使在保护模式下也允许通过系统进行部分观测。
The use of a liquid crystal Lyot filter as a simple and compact switchable laser protection system is demonstrated. The system OFF state exhibits a wavelength-independent transmission and switches to an ON state, which rejects a selected wavelength. The response time of the switchable system is <110 ms, depending on the rejected wavelength, with the ability for faster switching of <5 ms when using a lower-order rejection band. A rejection tuning range between 480 and 640 nm is demonstrated, and the potential to operate outside of the visible spectrum is discussed. In the ON state, the transmission at the rejected wavelength was found to be effectively limited by the polarizer extinction ratio, while transmission at other wavelengths allows for partial observations through the system even when in protection mode.