Long Measurement Range OFDR Beyond Laser Coherence Length

被引：45

作者：

Ding, Zhenyang ^{[1
,2
]}

Yao, X. Steve ^{[1
,2
,3
]}

Liu, Tiegen ^{[1
,2
]}

Du, Yang ^{[1
,2
]}

Liu, Kun ^{[1
,2
]}

Han, Qun ^{[1
,2
]}

Meng, Zhuo ^{[1
,2
]}

Jiang, Junfeng ^{[1
,2
]}

Chen, Hongxin ^{[3
]}

机构：

[1] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Key Lab Optoelect Informat Tech, Minist Educ, Tianjin 300072, Peoples R China

[3] Gen Photon Corp, Chino, CA 91710 USA

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2013年 / 25卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Frequency domain analysis; optical fiber measurement; phase noise; reflectometry; FREQUENCY-DOMAIN REFLECTOMETRY;

D O I：

10.1109/LPT.2012.2233728

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present a novel method to significantly extend the measurement range of an optical frequency domain reflectometry (OFDR) beyond the laser coherence length for both discrete reflection (such as Fresnel reflection) and Rayleigh backscattering measurements. A key to the method is to increase the laser frequency tuning speed while measuring the phase noise of the reflected optical signal that carries the location and reflectivity information. Using this technique in a conventional OFDR with a noise floor of -120 dB and a dynamic range of 53 dB, we achieved a measurable distance of 170 km for Fresnel reflection and 120 km for Rayleigh backscattering using a laser with a coherence length of only 13.6 km.

引用

页码：202 / 205

页数：4

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