激光与光电子学进展, 2019, 56 (1): 010602, 网络出版: 2019-08-01
基于互相关-LM法的布里渊峰值拟合算法 
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Brillouin Peak Fitting Algorithm Based on Correlation-LM Method
图 & 表
图 2. 互相关-LM法拟合。(a)未去除固有信号;(b)去除固有信号后
Fig. 2. Fitted by the cross-correlation-LM method. (a) Before and (b) after removing intrinsic signals
图 3. 双峰拟合示意图。(a)单纯互相关-LM法; (b)按多峰拟合算法
Fig. 3. Bimodal fitting.(a) Correlation-LM method; (b) bimodal fitting algorithm
图 4. 中心频率为10.75 GHz时不同算法的拟合仿真数据比较。(a)互相关-LM法;(b) PSO法;(c)传统LM法;(d)互相关法
Fig. 4. Comparison of different algorithms for fitting simulation data with the central frequency 10.75 GHz. (a) Correlation-LM method; (b) PSO method; (c) traditional LM method; (d) correlation method
图 5. 双峰拟合示意图。(a)双峰相距0.2 GHz,次峰高度为0.4;(b)双峰相距0.075 GHz,次峰高度为0.7
Fig. 5. Schematic of bimodal fitting. (a) Bimodal distance 0.2 GHz, second peak height of 0.4; (b) bimodal distance 0.075 GHz, second peak height of 0.7
图 8. 实验数据拟合比较图。(a)互相关-LM法;(b) PSO法;(c)传统LM法;(d)互相关法
Fig. 8. Comparison of experimental data fitting. (a) Correlation-LM method; (b) PSO method; (c) traditional LM method; (d) correlation method
表 1不同中心频率下拟合算法评价指标比较
Table1. Comparison of evaluation index of different fitting algorithm at different central frequencies
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高树国, 刘云鹏, 李欢, 田源, 范晓舟, 孙路, 孟令明. 基于互相关-LM法的布里渊峰值拟合算法[J]. 激光与光电子学进展, 2019, 56(1): 010602. Shuguo Gao, Yunpeng Liu, Huan Li, Yuan Tian, Xiaozhou Fan, Lu Sun, Lingming Meng. Brillouin Peak Fitting Algorithm Based on Correlation-LM Method[J]. Laser & Optoelectronics Progress, 2019, 56(1): 010602.
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