物理学报
物理學報
물이학보
2013年
4期
216-220
,共5页
王杰%贾新鸿%饶云江%吴慧娟
王傑%賈新鴻%饒雲江%吳慧娟
왕걸%가신홍%요운강%오혜연
相位敏感光时域反射仪%分布式光纤传感%拉曼放大
相位敏感光時域反射儀%分佈式光纖傳感%拉曼放大
상위민감광시역반사의%분포식광섬전감%랍만방대
phase-sensitive time-domain reflectometer%distributed optical-fiber sensor%Raman amplification
报道了一种基于双向拉曼放大延长相位敏感光时域反射仪分布式光纤传感系统传感距离的方法.利用双向拉曼抽运对信号光进行拉曼放大,补偿了光纤传输损耗.实验表明,该方法提高了整个传感光纤上信号光的分布均匀性,实现了74 km的超长传感距离和20 m的空间分辨率,同时,试验了不同信号光入纤功率和抽运功率对基于双向拉曼放大的相位敏感光时域反射仪系统的影响.
報道瞭一種基于雙嚮拉曼放大延長相位敏感光時域反射儀分佈式光纖傳感繫統傳感距離的方法.利用雙嚮拉曼抽運對信號光進行拉曼放大,補償瞭光纖傳輸損耗.實驗錶明,該方法提高瞭整箇傳感光纖上信號光的分佈均勻性,實現瞭74 km的超長傳感距離和20 m的空間分辨率,同時,試驗瞭不同信號光入纖功率和抽運功率對基于雙嚮拉曼放大的相位敏感光時域反射儀繫統的影響.
보도료일충기우쌍향랍만방대연장상위민감광시역반사의분포식광섬전감계통전감거리적방법.이용쌍향랍만추운대신호광진행랍만방대,보상료광섬전수손모.실험표명,해방법제고료정개전감광섬상신호광적분포균균성,실현료74 km적초장전감거리화20 m적공간분변솔,동시,시험료불동신호광입섬공솔화추운공솔대기우쌍향랍만방대적상위민감광시역반사의계통적영향.
In this paper, we report on a distributed sensing system of phase-sensitive optical time-domain reflectometer (Φ-OTDR) based on bi-directional Raman amplification. With the bi-directional Raman amplification, the transmission loss of the optical fiber can be compensated efficiently. The experimental characterization of evenly detected signals along the whole sensing distance of 74 km with 20 m spatial resolution is successfully demonstrated, resulting in the longest distributed sensing system based phase-sensitive optical time-domain reflectometer reported so far, to the best of our knowledge. The influences of different incident powers and pump powers onΦ-OTDR are studied experimentally.