Fig. 1. RDTS experimental system schematic.RDTS实验系统原理图

Fig. 2. RDTS experimental device diagram.RDTS实验装置图

Fig. 3. Experimental results: (a) Scattered light signal in fiber at 20 ℃; (b) scattered light signal when temperature changes; (c) temperature demodulation results of Δα ≈ 0; (d) fitting results of attenuation difference. 实验结果　(a) 20 ℃时光纤中的散射光信号; (b) 温度变化时的散射光信号; (c) Δα ≈ 0时的温度解调结果; (d)衰减差拟合结果

Fig. 4. Temperature corrected measurement: (a) Preliminary corrected measurement; (b) temperature measurement error before and after temperature correction.温度修正后的测量结果　(a)初步修正后的测量值; (b)温度修正前后的测温误差

Fig. 5. Temperature corrected final measurement results: (a) Rayleigh noise in fiber at 40 ℃ and 60 ℃; (b) rayleigh noise at different temperatures; (c) measurement results without Rayleigh noise before and after the introduction of Δα; (d) temperature error without Rayleigh noise before and after the introduction of Δα. 温度最终修正后的测量结果　(a) 40 ℃和60 ℃时光纤中的瑞利噪声; (b)不同温度下的瑞利噪声; (c)引入Δα前后消除瑞利噪声的测量结果; (d)引入Δα前后消除瑞利噪声的温度误差

Fig. 6. Temperature error after each order fitting: (a) The second correction error after introducing the fitting results of each order; (b) temperature increment for secondary correction after introduction of each order result.各阶修正效果　(a)引入各阶拟合结果二次修正后的误差; (b)引入各阶结果后二次修正的温度增量

Fig. 7. Additional error correction: (a) Additional error fitting result; (b) temperature error before and after additional error correction.附加误差修正　(a)附加误差拟合曲线; (b)附加误差修正前后的测温误差