High Optical Contrast Liquid Crystal Switch and Analogue Response Attenuator at 1550 nm

被引：8
|
作者：
Hu, Xuesong [1 ]
Hadaler, Oliver [1 ]
Coles, Harry J. [1 ]
机构：
[1] Univ Cambridge, Dept Engn, Ctr Mol Mat Photon & Elect, Cambridge CB3 0FA, England
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2011年 / 23卷 / 22期
关键词：
Liquid crystal; optical switch; telecommunication; variable optical attenuator; PHASE;
D O I：
10.1109/LPT.2011.2165840
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel mixture of low molar mass organosiloxane liquid crystals, with an optimum tilt angle of 22.5 degrees, exhibits very good alignment. A liquid crystal binary intensity switch with a high, >60 dB, extinction ratio and an analogue response attenuator, with 54 dB of attenuation, suitable for telecommunication applications at lambda = 1550 nm were constructed based on such a mixture. The switch and attenuator operate with fast rise times of similar to 10 mu s and similar to 3.8 mu s, respectively, at moderate electric fields of up to +/- 15 V mu m(-1).
引用
收藏
页码：1655 / 1657
页数：3
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