机构地区: 天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室
出 处: 《光电子.激光》 2005年第2期195-198,共4页
摘 要: 采用小波变换方法对分布式寄生偏振耦合测试仪(DPCA)采样数据进行滤波除噪。实验结果表明,通过采用Daubechies小波对采样数据进行5阶分解、除噪并重建信号后,信噪比(SNR)满足测量要求:SNR从65dB左右提高到80dB以上,SNR增益达到15dB以上,提高了光纤陀螺DCPA对保偏光纤绕组中偏振耦合点的检测灵敏度。 In the processing of the data sampled by the distributed polarization coupling analyzer (DPCA) wavelet-transform was applied to reduce the noise. Experimental results indicate that the signal-to-noise ratio (SNR) after denoising and recovering of the signal can meet the measurement requirements through five-stage denoising using Daubechies Wavelet. The SNR is improved from 65 dB to more than 80 dB, and the gain of SNR is more than 15 dB. As a result, the measurement sensitivity of DPCA for parasitic polarization mode coupling in fiber gyro coil is improved.