摘要
为提高Y波导调制器调制性能从而提高光纤陀螺的整体性能,分析了用于光纤陀螺的Y波导相位调制器残余强度调制产生的机理,即存在波导缺陷以及基底杂散光反射;阐述了残余强度调制对光纤陀螺系统特性的影响,残余强度调制主要影响光纤陀螺的标度因素;测试了不同Y波导残余强度调制的波形特性和它的线性分量及干涉分量大小,不同Y波导残余强度调制大小差异较大,性能好的Y波导残余强度调制大小可以控制在1‰以内;测试了温度对残余强度调制波形特性的影响,残余强度调制受温度影响较大,极端温差下残余强度调制大小波动可达20%;根据残余强度调制的产生机理和线性干涉分量比的大小,提出改进Y波导制作工艺的措施,以期提高Y波导的调制性能。
In order to improve modulation performance of Y waveguide modulator so as to improve the overall performance of fiber optical gyroscope（FOG）, mechanism for residual intensity modulation （RIM） of Y-waveguide phase modulator used in FOG are analyzed, namely waveguide defects and substrate stray light reflection. Then the influence of RIM on characteristics of FOG system, and calibration factor of RIM influence mainly on FOG are described. Waveform characteristic of RIM of different Y-waveguide phase modulators and its value of linear components and interference are tested. Difference of RIM of different Y waveguide modulators is large. The value of RIM with good performance Y-waveguide modulator can be controlled within 1‰. Influences of temperature on waveform characteristic of RIM are tested. Fluctuations of RIM value can reach 20% under extreme temperature. Finally according to RIM mechanism and ratio of linear interference components,the measures for improving Y waveguide technology are put forward.
出处
《应用光学》
CAS
CSCD
北大核心
2017年第6期974-978,共5页
Journal of Applied Optics
基金
国家自然科学基金(61575012/61575013)
