带光放大器的分布式光纤拉曼温度系统
Distributed optical fiber Raman temperature sensor with amplifier
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摘要: 详细阐述了红外双波长带光放大器的分布式光纤拉曼温度系统原理，为了抑制放大器的自发辐射增长、温漂噪声积累、瑞利背向散射光窜扰反斯托克斯背向散射光，采用两条已知温度的曲线和最近测量温度曲线的解调方法,提高了系统的测温精度和稳定性并降低了系统的成本。实验结果与理论分析一致,系统的测温误差在±0.1 ℃内。Abstract: This paper expatiates on the theory of a distributed infrared optical fiber Raman temperature sensor on the infrared double wavelength with a Er doped waveguide amplifier. For restraining the amplifier ASE increase and the temperature excursion accumulation and the anti-Stokes back-scattering intermingling with the Rayleigh back scattering, it thinks over what to demodulate on the basis of the newly acquired temperature curves and two pending standard temperature curves. It advances the temperature precision to ±0.1 ℃ and system stability, it reduces the cost and has the consistency of theory and test.
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