基于喇曼/掺铒光纤混合放大的长距离布喇格光栅传感器系统  

Long-Distance Fiber Bragg Grating Sensor System Based on Hybrid Raman/Erbium-Doped Fiber Amplification

作　　者：陈容睿[1] 饶云江[1] 冉曾令[2] 聂玲[1] 

机构地区：[1]重庆大学光电工程学院,重庆400044 [2]电子科技大学通信和信息工程学院,成都610054

出　　处：《光子学报》2007年第3期507-510,共4页Acta Photonica Sinica

基　　金：教育部重点基金(104210)资助

摘　　要：提出了一种提高长距离光纤布喇格光栅信噪比以进行准分布测量的新方法.本方法基于双向喇曼放大和双掺铒光纤结构,喇曼光纤放大器对布喇格光栅信号进行低噪音的双向放大,置于远处的掺铒光纤利用剩余的泵浦功率产生自发辐射光和放大传感信号,为第二段掺铒光纤之后的远处布喇格光栅传感器提供光以及补偿由于长距离传输造成的光纤损耗.实验显示传感器系统的性能得到显著提高.使用功率为240 mW的单个普通泵浦,分布在50 km光纤上的FBG均可获得15 dB的良好信噪比,比混合放大前提高了10 dB.A novel method based on the combination of the bidirectional Raman amplification and the dual Erbium-doped fiber （EDF） based configurations was proposed for performance enhancement of long- distance fiber Bragg grating （FBG） sensor systems to achieve quasi-distributed measurement. The Raman fiber amplifier was used for achieving low-noise bidirectional amplification of FBG signals while the EDF arranged remotely was used for the illumination of remotely-located FBG sensors beyond the second EDF arrangement and the compensation of the fiber loss due to long-distance transmission,by using the residual Raman pump power to generate ASE light and amplification, respectively. Experimental results show that the performance of the sensor system has been improved significantly. An excellent SNR of-15 dB has been achieved for a 50 km transmission distance with only a normal pump power of - 240 mW , which is 10 dB higher than that without amplification.

关 键 词：光纤布喇格光栅(FBG) 长距离传感 喇曼放大 掺铒光纤放大 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]