Laser detection using liquid crystal polarization modulators

被引：0
作者：
Benton, David M. [1 ]
机构：
[1] Aston Univ, Aston Inst Photon Technol, Birmingham, W Midlands, England
来源：
OPTICAL ENGINEERING | 2020年 / 59卷 / 06期
关键词：
laser detection; interferometry; liquid crystal;
D O I：
10.1117/1.OE.59.6.064106
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Lasers can be identified by their relatively long coherence lengths using interferometry. A Mach-Zehnder interferometer incorporating liquid crystal polarization modulators is demonstrated as a means of low-cost, robust laser detection. Temporal modulations, as a signature of coherence, can be induced by modulating polarization changes in liquid crystal modulators using low voltages. Sensitivities of < 10 nW can be achieved. The suitability as a means of laser detection is discussed. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：9
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