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

Optics Express
Xing-jun WangYan-qing Lu

Abstract

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.

References

Jul 11, 2007·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Richard JamesWilliam A Crossland

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