摘要
首次将超长光纤环形激光器的光放大应用于布里渊光时域分析(BOTDA)传感系统,以延伸传感距离。通过对布里渊泵浦消耗、拉曼泵浦相对强度噪声(RIN)转移的抑制及拉曼泵浦功率分布的优化,基于对布里渊增益谱分析的原理在94km的传感距离上实现了3m空间分辨率,以及全程28με/1.4℃应变/温度精度。
A novel optical amplification configuration based on ultra-long fiber laser with a ring cavity was proposed and applied to Brillouin optical time-domain analysis (BOTDA) sensing system ,in order to extend the measurement distance significantly . The parameters used in the experiment were optimized ,considering the main limitations of the setup ,such as depletion ,self-phase modulation (SPM) and pump-signal relative intensity noise (RIN) transfer .Through analyzing Brillouin gain spectrum , we demonstrated distributed sensing over 94 km of standard single-mode fiber with 3 meter spatial resolution and strain/tempera-ture accuracy of 28 /1.4 ℃ .
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2014年第5期1191-1195,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(61290312
61205048
61106045)
教育部长江学者和创新团队发展计划项目
高等学校博士学科点专项科研基金项目(20120185120003)
中央高校基本科研业务费专项(ZYGX2012J002)资助