Phase-Sensitive Optical Time-Domain Reflectometry Amplified by Gated Raman Pump

• 作者: Yi LI Yi ZHOU Li ZHANG Mengqiu FAN Jin LI
• 来源期刊: 光子传感器:英文版
• 学科: 工学
• 关键词: 拉曼放大 光时域反射计 门控 泵浦 相敏 光时域反射技术 放大自发辐射 空间分辨率
• 年，卷（期）: 2015,（4）
• 页码范围: 345-350
• 页数: 6页
• 分类号: TN929.1
• 语种: 中文

摘要

A long-range phase-sensitive optical time-domain reflectometry is proposed and experimentally demonstrated, based on the gated Raman amplification (RA). This technique can reduce the amplified spontaneous emissions (ASE) noise of the Raman pump while extend the sensing distance. A direct-detection based phase-sensitive optical time-domain reflectometry (O-OTDR) with an operation range of 50 km and a spatial resolution of 20 m has been demonstrated. The influence of different delay time of the gated Raman pump on the O-OTDR system is also discussed.