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A 100 km Fiber Bragg Grating Sensor System Based on Swept Laser and Optical Amplification
Author(s): 
Pages: 680-683
Year: Issue:  5
Journal: CHINESE JOURNAL OF LASERS

Keyword:  光纤光学光纤传感器光纤布拉格光栅传感器扫描激光器拉曼放大掺铒光纤放大;
Abstract: 提出了对基于扫描激光器的光纤布拉格光栅(FBG)传感系统进行掺铒光纤(EDF)/双波拉曼混合放大的方法,大幅度提高了该光纤布拉格光栅传感系统的传输距离.该方法以高功率扫描激光器作为光源,采用双波长拉曼放大的方法对信号进行低噪声双向放大,再利用系统中间的两段掺铒光纤,将剩余的拉曼抽运功率用来产生自发辐射光和放大传感信号,使得整个系统能在超长的传感距离上获得良好的信噪比(sNR).实验表明使用一台扫描激光传感分析仪、一只170 mW的拉曼抽运和一只2 W的拉曼抽运,可以使传感距离达到100 km以上,并且传感系统的光纤布拉格光栅反射信号均能获得超过7 dB的良好信噪比,从而实现在超长距离上的光纤布拉格光栅传感.
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