Liquid crystal modulator with ultra-wide dynamic range and adjustable driving voltage | Zendy

Xingjun Wang | Zendy; Zhang-di Huang | Zendy; Jing Feng | Zendy; Xiangfei Chen | Zendy; Xiao Liang | Zendy; Yanqing Lu | Zendy

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Liquid crystal modulator with ultra-wide dynamic range and adjustable driving voltage

Author(s) -

Xingjun Wang,

Zhang-di Huang,

Jing Feng,

Xiangfei Chen,

Xiao Liang,

Yanqing Lu

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.013168

Subject(s) - optics , materials science , optical modulator , birefringence , liquid crystal , phase modulation , dynamic range , voltage , total internal reflection , liquid crystal on silicon , electro optic modulator , spatial light modulator , contrast ratio , optoelectronics , physics , phase noise , quantum mechanics

We demonstrated a reflective-type liquid crystal (LC) intensity modulator in 1550 nm telecomm band. An effective way to compensate the residual phase of a LC cell is proposed. With the adjustment of a true zero-order quarter wave plate and enhanced by total internal reflection induced birefringence, over 53 dB dynamic range was achieved, which is much desired for some high-end optical communication, infrared scene projection applications. In addition, the driving voltages were decreased and adjustable. Mechanical and spectral tolerance measurements show that our LC modulator is quite stable. Further applications of our experimental setup were discussed including bio-sensors and high speed modulators.

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