中国电子科技2006，Vol.4Issue(3)：232-236,5.
Recent Advances in Long-distance FBG Sensor Systems at UESTC
Recent Advances in Long-distance FBG Sensor Systems at UESTC
摘要
Abstract
Recent progress in long-distance in-Fiber Bragg Grating (FBG) sensor systems at University of Electronic Science & Technology of China (UESTC) is reviewed in this paper. Two novel approaches with a 50km transmission distance are proposed and demonstrated. The first one is based on the combination of bidirectional Raman amplification and a dual Erbium-Doped Fiber (EDF) configuration. A good Signal-to-Noise Ratio (SNR) of ～16dB is achieved with only a pump power of ～280 mW, which is ～10 dB higher than that without amplification. The second is based on a novel tunable fiber ring laser configuration with hybrid Raman/EDFA configuration. Experimental results show that an excellent optical SNR of ～60 dB has been achieved for a 50 km transmission distance with a low Raman pump power of ～170 mW and a low EDFA pump power of ～40 mW at wavelength of 980 nm. It is anticipated that these long-distance FBG sensing systems could find important applications in health monitoring of large infra-structures, such as oil or gas pipelines, ultra-long bridges and tunnels, river banks, and so on.关键词
optic fiber sensors/fiber Bragg grating sensors/fiber ring lasers/Raman amplification/Erbium-doped fiber amplifiersKey words
optic fiber sensors/fiber Bragg grating sensors/fiber ring lasers/Raman amplification/Erbium-doped fiber amplifiers分类
信息技术与安全科学引用本文复制引用
RAO Yun-Jiang,RAN Zeng-Ling..Recent Advances in Long-distance FBG Sensor Systems at UESTC[J].中国电子科技,2006,4(3):232-236,5.基金项目
Supported by the Key Project of National Natural Science Foundation of China (No.60537040) （No.60537040）
