Recent Advances in Long-Distance FBG Sensor Systems at UESTC (Invited Paper)
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 ～280mW, which is ～10dB 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 ～60dB has been achieved for a 50km transmission distance with a low Raman pump power of ～170mW and a low EDFA pump power of ～40mW at wavelength of 980nm. 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, et al.
Optic fiber sensors FBG sensors,Fiber ring lasers Raman amplification EDFA.
Yun-Jiang Rao Zeng-Ling Ran
Key Lab of Broadband Optical Fiber Transmission & Communication Networks Technologies (Education Min Key Lab of Broadband Optical Fiber Transmission & Communication Networks Technologies (Education Min
国际会议
成都
英文
391-397
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）