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首页> 外文会议>Conference on Applications of Photonic Technology >Optical signal-to-noise enhancement of a single-ended fiber optic spontaneous Brillouin-intensity-based distributed temperature sensor
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Optical signal-to-noise enhancement of a single-ended fiber optic spontaneous Brillouin-intensity-based distributed temperature sensor

机译：基于单端光纤自发布里渊强度的分布式温度传感器的光信号 - 噪声增强

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摘要

An optical preamplifier system consisting of a 27dB-gain erbium-doped fiber amplifier, a three-port circulator and a 47GHz bandwidth in-fiber grating has improved receiver sensitivity and consequently sensor range of a spontaneous Brillouin-based fiber-optic distributed temperature single-ended sensor. Optical signal-to-noise has improved by 17dB. Using this system and operating at 1533nm, a sensor with a range of 23km, spatial resolution of 1.8m, measurement time of 9 minutes and temperature resolution of 6K was implemented. The temperature resolution was attributed to contamination of the backscattered spontaneous Brillouin signal by the residual Rayleigh signal after optical filtering. The optical signal-to-noise is supported theoretically by considering associated noise sources.
机译：由27dB增益掺铒光纤放大器，三端口循环器和47GHz带宽光栅组成的光学前置放大器系统具有改进的接收器灵敏度，并且因此自发布里渊的光纤分布式温度单次结束传感器。光信号对噪声的提高17dB。使用该系统并在1533nm下运行，一个范围为23km，空间分辨率为1.8米，测量时间为9分钟，温度分辨率为6k。温度分辨率归因于光学滤波后残余瑞利信号污染反向散射的自发布里渊信号。通过考虑相关的噪声源理论地支持光信号对噪声。

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