Chinese Journal of Quantum Electronics, Volume. 28, Issue 2, 202(2011)
Characteristics of LiNbO3 waveguide voltage sensor based on symmetrical metal-cladding optical waveguide
A new type of voltage sensor employing a symmetrical metal-cladding optical waveguide structure is proposed which utilized the sensitive property of ultrahigh-order modes of the metal-cladding optical waveguide. The voltage change can be determined by measuring the reflected light intensity when a direct voltage is applied to two electrodes to modulate the reflected light intensity through the refractive index change of LiNbO3 . The measurement range of voltage is from -800 V to 800 V with linearity of 0.995. The sensitivity coefficient of reflectivity light intensity is about 0.2% V-1. The results show that the voltage sensor has good linearity and high voltage sensitivity. And it has advantages of easy operating and cheap building up in measurement.
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YUAN Wen, SANG Ming-huang, CHEN Xian-feng, XIAO Ping-ping, CAO Zhuang-qi, GUO Qin. Characteristics of LiNbO3 waveguide voltage sensor based on symmetrical metal-cladding optical waveguide[J]. Chinese Journal of Quantum Electronics, 2011, 28(2): 202
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Received: Nov. 16, 2010
Accepted: --
Published Online: Mar. 28, 2011
The Author Email: Wen YUAN (yuanwen@sjtu.edu.cn)
CSTR:32186.14.