光学学报, 2020, 40 (20): 2030001, 网络出版: 2020-10-16
布里渊光谱仪的高精度波长标定方法研究 
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Wavelength Calibration of Ultra-High Resolution Brillouin Spectrometer
图 & 表
图 2. 布里渊光谱仪的光谱测量流程。(a)待测信号;(b)泵浦信号;(c)受激布里渊效应放大后的输出信号;(d)基底移除后的分光光谱信号;(e)采用可调谐激光推扫得到的全波段分光光谱信号;(f)利用光谱重构算法得到的测量光谱
Fig. 2. Spectra measurement procedure of Brillouin spectrometer. (a) Signal under test (SUT); (b) pump signal; (c) output signal amplified by stimulated Brillouin scattering; (d) split spectra after baseline removing; (e) full band split spectra by tunable laser; (f) measured spectra obtained by spectrum reconstruction algorithm
图 3. FP标准具的光路图和波长透过特性。(a)光路图;(b)波长透过特性
Fig. 3. Optical path and wavelength transmission property of FP etalon. (a) Optical path; (b) wavelength transmission property
图 5. 布里渊光谱仪产生鬼线的机制。(a)受激布里渊增益特性;(b)包含鬼线的测量数据
Fig. 5. Ghost lines generation mechanism in Brillouin spectrometer. (a) Gain property of stimulated Brillouin scattering; (b) measured data with ghost
图 6. 鬼线识别校正流程。(a)波峰拟合;(b)波谷拟合;(c)鬼线校正后的测量光谱
Fig. 6. Ghost lines identification and correction procedure. (a) Peak fitting; (b) valley fitting; (c) spectra after ghost lines correction
图 7. 相对波长的标定。(a)实验装置;(b)测量数据;(c)波长标定的拟合结果;(d)标定波长的残差
Fig. 7. Calibration of relative wavelength. (a) Experimental setup; (b) measured data; (c) fitting result of wavelength calibration; (d) residual of calibration wavelength
图 8. 绝对波长标定。(a)实验装置;(b)测量数据;(c)波长标定的拟合结果;(d)波长标定残差
Fig. 8. Calibration of absolute wavelength. (a) Experimental setup; (b) measured data; (c) fitting result of wavelength calibration; (d) residual of calibration wavelength
刘加庆, 刘磊, 刘雷, 李志增, 吴威, 胡垒军, 刘志明. 布里渊光谱仪的高精度波长标定方法研究[J]. 光学学报, 2020, 40(20): 2030001. Jiaqing Liu, Lei Liu, Lei Liu, Zhizeng Li, Wei Wu, Leijun Hu, Zhiming Liu. Wavelength Calibration of Ultra-High Resolution Brillouin Spectrometer[J]. Acta Optica Sinica, 2020, 40(20): 2030001.
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