Characteristics of LiNbO3 waveguide voltage sensor based on symmetrical metal-cladding optical waveguide

Abstract

Abstract:

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 800V to 800V with linearity is 0.995. The sensitivity coefficient of reflectivity light intensity is about 0.2V-1. The results show that the voltage sensor has the good linearity and the high voltage sensitivity. And it has advantages of easy operating and cheap building up in measurement.

Key words: waveguide optics, double metal-cladding optical waveguide, LiNbO3, voltage sensor

CLC Number:

TN253

YUAN Wen, SANG Ming-huang, CHEN Xian-feng, XIAO Ping-ping . Characteristics of LiNbO3 waveguide voltage sensor based on symmetrical metal-cladding optical waveguide[J]. J4, 2011, 28(2): 202-205.

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