用于分布式光纤传感的光栅辅助偏振光时域反射仪

Grating-assisted polarization optical time-domain reflectometry for distributed fiber-optic sensing.

作者信息

Han Ming, Wang Yunjing, Wang Anbo

机构信息

Center for Photonics Technology. Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0111, USA.

出版信息

Opt Lett. 2007 Jul 15;32(14):2028-30. doi: 10.1364/ol.32.002028.

DOI:10.1364/ol.32.002028

PMID:17632632

Abstract

We report a novel type of polarization optical time-domain reflectometry (POTDR) for fully distributed fiber-optic sensing, in which the reflected optical signal is from a series of fiber Bragg gratings that are uniformly distributed along the fiber. Compared with a conventional POTDR that uses the Rayleigh backscattering, this grating-assisted POTDR can have a much better signal-to-noise ratio and consequently a better measurement resolution and a larger measurement range of the fiber birefringence. Experimental results have shown that the measurement resolution of the grating-assisted POTDR is almost an order of magnitude better than that of a conventional POTDR.

摘要

我们报道了一种用于全分布式光纤传感的新型偏振光时域反射仪（POTDR），其中反射光信号来自沿光纤均匀分布的一系列光纤布拉格光栅。与使用瑞利背散射的传统POTDR相比，这种光栅辅助的POTDR可以具有更好的信噪比，从而具有更好的测量分辨率和更大的光纤双折射测量范围。实验结果表明，光栅辅助POTDR的测量分辨率比传统POTDR几乎好一个数量级。