【摘要】：為提高Y波導(dǎo)調(diào)制器調(diào)制性能從而提高光纖陀螺的整體性能,分析了用于光纖陀螺的Y波導(dǎo)相位調(diào)制器殘余強(qiáng)度調(diào)制產(chǎn)生的機(jī)理,即存在波導(dǎo)缺陷以及基底雜散光反射;闡述了殘余強(qiáng)度調(diào)制對光纖陀螺系統(tǒng)特性的影響,殘余強(qiáng)度調(diào)制主要影響光纖陀螺的標(biāo)度因素;測試了不同Y波導(dǎo)殘余強(qiáng)度調(diào)制的波形特性和它的線性分量及干涉分量大小,不同Y波導(dǎo)殘余強(qiáng)度調(diào)制大小差異較大,性能好的Y波導(dǎo)殘余強(qiáng)度調(diào)制大小可以控制在1‰以內(nèi);測試了溫度對殘余強(qiáng)度調(diào)制波形特性的影響,殘余強(qiáng)度調(diào)制受溫度影響較大,極端溫差下殘余強(qiáng)度調(diào)制大小波動可達(dá)20%;根據(jù)殘余強(qiáng)度調(diào)制的產(chǎn)生機(jī)理和線性干涉分量比的大小,提出改進(jìn)Y波導(dǎo)制作工藝的措施,以期提高Y波導(dǎo)的調(diào)制性能。
[Abstract]:In order to improve the modulation performance of Y-waveguide modulator and improve the overall performance of fiber optic gyroscope, the mechanism of residual intensity modulation of Y-waveguide phase modulator for fiber optic gyroscope is analyzed, that is, the defect of waveguide and the reflection of stray light on the substrate. The influence of residual intensity modulation on the system characteristics of fiber optic gyroscope (fog) is described. The scaling factors of fog are mainly affected by residual intensity modulation (RIM), and the waveform characteristics of residual intensity modulation in different Y waveguides and its linear and interference components are tested. The residual intensity modulation of Y waveguide with good performance can be controlled within 1 鈥，

本文編號：2122511