基于双探测器的光源相对强度噪声抑制方案

Relative intensity noise suppression scheme based on dual detectors

针对传统和现有光路抑制方案在常温条件下表现良好但在全温度范围内性能却难以保证的问题,提出了一种基于双探测器的光源相对强度噪声(RIN)抑制方案。该方案通过双探测器分别检测经不同路径的光信号,并在电路中将这2路信号同步后相减,以消除RIN,从而提高光纤陀螺的精度。同时,还探究了不同调制深度对陀螺输出的影响及未来对该方案的改进思路。实验结果表明:在调制深度为3π/4并且配合双探测器的RIN抑制措施的情况下,该方案能有效提高光纤陀螺的精度,并满足全温条件下的使用要求。

To address the issue where traditional and existing optical path suppression schemes perform well at room temperature but struggle to maintain performance across all temperature ranges,a relative intensity noise(RIN)suppression scheme based on dual detectors is proposed.This scheme uses dual detectors to separately detect optical signals passing through different paths and subtracts these signals in the circuit after synchronization to eliminate RIN,thereby improving the precision of fiber optic gyroscope.Additionally,the impact of different modulation depths on gyroscope output and potential improvements to the scheme are explored.The experimental results show that with a modulation depth of 3π/4 and the use of RIN suppression measures employing dual detectors,the scheme effectively enhances the precision of fiber optic gyroscope and meets usage requirements across all temperatures.