A single-mode single-polarization monolithically silica waveguide ring resonator used in microoptic gyro

Abstract

A single-mode single-polarization waveguide (SMSPW) ring resonator for the microoptic gyro (MOG) was proposed, and it could be monolithically integrated onto a silica planar lightwave circuit. We have presented the design of a three-dimensional SMSPW ring resonator in which the TM mode cuts off and the TE mode transmits by taking into consideration the stress-induced birefringence effect of the Si-based silica waveguide using the effective-index method. The characteristics of the light propagation across the SMSPW resonator were studied by a three-dimensional finite difference beam propagation method. Numerical simulation results showed the SMSPW ring resonator has a high extinction ratio over 50 dB cm À1 for the TM mode, low propagation loss of 0.055 dB cm À1 for the TE mode, and a high finesse of 36. A rate detection limit of 0.8 h À1 can be achieved. Without increasing the complexity of the waveguide fabrication process, this structure can solve the MOGs output bias instabilities induced by polarization fluctuations and provide a new solution for MOGs.

Transfer function of optical waveguide ring resonator in frequency domain for micro-optic gyro

“…In R-MOG system, the signal modulation and the detection technique are very important in the MOG system, because the detection precision decides the ultimate sensitivity of the gyro directly. Several groups have researched and proposed different R-MOG schemes [4][5][6][7][8] . There are two main open-loop detection methods: the laser frequency modulation (FM) [9,10] and phase modulation (PM) [11,13] .In the PM spectroscopy technique, the modulation signal and the feedback signal are separated.…”

Direct-Coupled Large-Diameter Silica on Silicon Waveguide Ring Resonator Used in Microoptic Gyro

“…The performance of a MOG is determined by the resonance frequency difference in the clockwise (CW) and counterclockwise (CCW) (Haavisto and Pajer 1980;Connors and Mahapatra 1987;Walker and Wilkinson 1983;Naumaan and Boyd 1986;Bismuth et al 1991;Ciminelli et al 2010;Yu et al 2009;Guo et al 2010). Early research is focused mostly in the polymer ring resonator and glass ion exchange waveguide ring resonator.…”