光波导环形谐振腔的多圈结构研究.pdfVIP

1 Optical waveguide ring resonator with multi-turn structure * Wang Shijun ，Ma Hulian ，Jin Zhonghe Department of Information Science Electronic Engineering ，Zhejiang University ，Hangzhou (310027) E-mail ：shijun1014@ Abstract 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 1 Introduction A small, robust, tactical grade performance gyro is vital for the successful implementation of the smart weapons and surveillance apparatus. As a promising candidate, Resonator Micro Optic Gyro (R-MOG) is