谐振式硅基二氧化硅集成光学陀螺的克尔噪声研究

分析了集成光学谐振式陀螺中克尔噪声的产生机理，利用导波光学理论建立了克尔噪声的数学模型，并基于此模型得出了克尔噪声对集成光学陀螺极限灵敏度影响的数学表达。分析了不同光源谱宽下谐振腔腔长与克尔噪声引起陀螺输出偏移之间的关系；针对集成光学陀螺中克尔噪声的主要产生原因谐振腔中顺、逆时针的光强不均衡，仿真分析了系统中集成光学调制器的Y分支波导分光比不均衡对陀螺输出的影响，给出了集成光学陀螺中克尔噪声的抑制方法，最后给出了实验装置并采用通过可变衰减器的方法调节入射到谐振腔的光强使两光路光强严格相等，有效地抑制克尔噪声，并给出了初步实验结果。

Abstract

The principle of Kerr noise is analyzed in the integrated optical resonator gyroscope (IORG), and the mathematical model is built by the theory of guided-wave optics, the relation of the fundamental detection limit caused by the Kerr noise Ωk is formulated. Furthermore, the curve of resonator length with Ωk under different spectrum line widths of laser is simulated. As to the prominent reason of Kerr noise in the IORG which is the unbalance splitting ratio of integrated optical modulation, the calculation and software simulation are carried out. After that, the suppression methods to eliminate the Kerr noise are put forward. Finally, the experimental setup is built up and by adjusting the adjustable attenuator the equal optical intensity is realized, which shows that the Kerr noise in the IORG is effectively suppressed simultaneously.

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于怀勇, 张春熹, 冯丽爽, 洪灵菲, 王俊杰. 谐振式硅基二氧化硅集成光学陀螺的克尔噪声研究[J]. 光学学报, 2011, 31(10): 1013003. Yu Huaiyong, Zhang Chunxi, Feng Lishuang, Hong Lingfei, Wang Junjie. Research on Kerr-Effect-Induced Noise of Integrated Optical Gyroscope Based on Silicon on SiO2 Waveguide Resonator[J]. Acta Optica Sinica, 2011, 31(10): 1013003.

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