谐振式硅基集成光学陀螺的偏振噪声建模与分析

偏振噪声是谐振式集成光学陀螺的主要光学噪声源,其存在大大降低了系统的精度,为了定量化研究谐振式集成光学陀螺偏振噪声的产生机理,利用琼斯矩阵和光束传播法建立了谐振式硅基集成光学陀螺偏振噪声模型,该模型综合考虑了波导传输介质中的光偏振态交叉耦合、应力双折射等的影响,有效地逼近了实际的物理系统。基于上述模型得出了谐振腔内二氧化硅波导本征偏振态交扰与陀螺极限输出之间的表达式。对波导谐振腔内与偏振相关的3个因素:输入光偏振态、温度波动和波导保偏性能进行了仿真分析。并通过在输入端插入高偏振度起偏器的实验装置,有效验证了所建偏振理论模型受输入光偏振态波动影响的正确性。

Modeling of polarization noise in silicon integrated optical resonance gyroscope and performance analysis

Polarization coupling noise is one of the essential optical noises in the integrated optical resonance gyroscope(IORG),for which the output precision of IORG is greatly degraded.For quantitatively describing the mechanism of the polarization coupling noise,the polarization model of IORG,considering the influence of stress birefringence and the cross coupling of eigenstates of polarization(ESOPs),was constructed by Jones matrix and beam propagation method(BPM).The relationship between the fundamental of detection of IORG and the polarization noises related degradation factors was formulized.Simulation and analysis of the three prominent factors related with polarization noise in the waveguide resonator of IORG,degree of polarization(DOP),peripheral environmental temperature fluctuation,and polarization maintaining performance of waveguide,were carried out.Finally,by constructing the experimental setup with a high DOP polarizer placed before the each input light port of the waveguide resonator chip,the polarization fluctuation in the waveguide resonator is effectively suppressed.