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Optical waveguide ring resonator with multi-turn structure
Wang Shijun * #,Ma Huilian,Jin Zhonghe
Department of Information Science & Electronic Engineering, Zhejiang University
*Correspondence author
#Submitted by
Subject:
Funding: 教育部博士点基金（No.20060335064）
Opened online:16 January 2008
Accepted by: none
Citation: Wang Shijun,Ma Huilian,Jin Zhonghe.Optical waveguide ring resonator with multi-turn structure[OL]. [16 January 2008] http://en.paper.edu.cn/en_releasepaper/content/18138
 
 
Resonator micro optic gyro (R-MOG) is a high accuracy inertial rotation sensor based on the Sagnac effect. Optical waveguide ring resonator (OWRR) is the core-sensing element in R-MOG. Calculations show that the shot noise limited sensitivity of the gyro can be improved by introducing the multi-turn structure into the ring when the excess loss of the crossed waveguides is lower than a critical value. The OWRR with two turns is fabricated on silica waveguide by low pressure chemical vapor deposition (LPVCD) method. Measurements show that the finesses of the one-turn resonator and the two-turn resonator are 50.8 and 20.0 respectively. The great degeneracy of the finesse is due to that the excess loss of the crossed waveguides is high as 0.899dB. Further analysis shows when the excess loss is lower than 0.3dB, the gyro sensitivity will be increased by means of the OWRR with multi-turn structures.
Keywords:resonator micro optic gyro; optical waveguide ring resonator; crossed waveguides; limited sensitivity
 
 
 

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