Influence of non-perfect extinction ratio of electro-optic modulator on signal-to-noise ratio of BOTDR
Influence of non-perfect extinction ratio of electro-optic modulator on signal-to-noise ratio of BOTDR
复制标题
电光调制器非完美消光比对BOTDR信噪比的影响
DOI：
10.1016/j.optcom.2013.01.080
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发表时间：
2013-06-15
影响因子：
2.4
通讯作者：
Zhang, Xuping
中科院分区：
文献类型：
--
作者：
Lu, Yuangang;Yao, Yuguo;Zhang, Xuping
从理论上研究了电光调制器 (EOM) 的漏光对布里渊光时域反射计 (BOTDR) 性能的影响并通过实验进行了验证。事实证明，在频率扫描BOTDR中，漏光会产生额外的噪声项，并降低布里渊频移(BFS)和温度的测量精度。当EOM的ER从50 dB降低到25 dB时，23.9 km光纤的最大温度测量不确定度从1.9°C增加到5.6°C。 (C) 2013 Elsevier B.V. 保留所有权利。
The effect of leakage light of an electro-optic modulator (EOM) on the performance on a Brillouin optical time domain reflectometer (BOTDR) is investigated theoretically and demonstrated experimentally. It is proved that in a frequency-scanning BOTDR, the leakage light gives rise to additional noise term, and deteriorate the measurement accuracy of Brillouin frequency shift (BFS) and temperature. The maximum temperature measurement uncertainty of the 23.9 km fiber increases from 1.9 degrees C to 5.6 degrees C when the ER of EOM decreases from 50 dB to 25 dB. (C) 2013 Elsevier B.V. All rights reserved.