联合测量系统的一个分布式的极化模式被设计并且实现了使用白轻 interferometry。它能被用于极化模式在多达 1 km 的 high-birefringence 纤维联合的测量。这个系统能在光纤的传感器和光纤维通讯中被使用。小浪变换在处理改进 signal-noise-ratio 的数据被采用。这个系统的 signal-noise-ratio 被改进在降噪以后的超过 15 dB。在 signal-noise-ratio 和测量精确性上降噪阀值的影响也被讨论。Hilbert 变换和非线性的回归能与小浪变换一起被使用提高 signal-noise-ratio 和这个系统的空间分辨率。关键词小浪变换 - 降噪 - 极化 CLC TN253 - TP212.14 这个工作被国家自然科学资金支持中国(号码 60377031 ) ,中国(号码 2003CB314907 ) 的国家基本研究程序,和为大学里的新世纪优秀才能的程序。
A distributed polarization-mode coupling measurement system was designed and implemented using white light interferometry. It can be used for the measurement of polarization mode coupling in a high-birefringence fiber of up to i km. This system can be used in both fiber-optic sensors and optical fiber communications. Wavelet Transform was adopted in data processing to improve the signal-noise-ratio. The signal-noise-ratio of this system was improved more than 15 dB after denoising. The influence of denoising threshold on signal-noise-ratio and measurement accuracy was also discussed. Hilbert Transform and non-linear regression can be used in conjunction with Wavelet Transform to enhance the signal-noise-ratio and spatial resolution of this system.