Fan Xinyu, Koshikiya Yusuke, Ito Fumihiko
NTT Access Network Service Systems Laboratories, NTT Corporation, 1-7-1 Hanabatake, Tsukuba, Ibaraki 305-0805, Japan.
Opt Express. 2011 Sep 26;19(20):19122-8. doi: 10.1364/OE.19.019122.
We present a bandwidth-division phase-noise-compensated optical frequency domain reflectometry (PNC-OFDR) technique, which permits a fast sweep of the optical source frequency. This method makes it possible to reduce the influence of environmental perturbation, which is the dominant factor degrading the spatial resolution of frequency-domain reflectometry at a long measurement range after compensation of the optical source phase noise. By using this approach, we realize a sub-cm spatial resolution over 40 km in a normal laboratory environment, and a 5 cm spatial resolution at 39.2 km in a field trial.
我们提出了一种带宽分割相位噪声补偿光频域反射测量（PNC-OFDR）技术，该技术允许快速扫描光源频率。这种方法能够减少环境扰动的影响，环境扰动是在补偿光源相位噪声后，在长测量范围内降低频域反射测量空间分辨率的主要因素。通过使用这种方法，我们在正常实验室环境中实现了超过40公里的亚厘米空间分辨率，在现场试验中在39.2公里处实现了5厘米的空间分辨率。
