Study on a New Method for Instrumental Line Shape Measurement of Spatial Heterodyne Interference Spectrometer
XIONG Wei1, 2, 3, SHI Hai-liang2, YU Neng-hai1, 2
1. Key Laboratory of Electromagnetic Space Information, Chinese Academy of Sciences, Hefei 230022, China 2. Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230022, China 3. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
Abstract：Spatial heterodyne spectroscopy(SHS)is a novel method for hyper-spectral analysis, and instrument line shape function is one of the basic performance parameters, which should be precisely characterized. Based on the analysis of the influence factors(apodization, limited angle, abaxial detector element ) and special requirement for measuring method and source, the present paper put forward a new method for measuring with tunable monochromatic light source, and designed experimental equipment with tunable laser and integrating sphere eliminating speckle. Selecting typical spectral range within band range for high spectral resolution scanning (0.1nm step), the energy distribution of spectrum was obtained according to error correction, spectral reconstruction and normalization .In addition, rule curve for FWHM and wavelength was obtained by the full spectral range scanning interferogram. Finally, theoretical spectrum, ILS convolution simulated spectrum(LBL calculated), and measured carbon dioxide absorption spectrum by ground-based experiment are in good agreement .The result shows that the instrument line shape function exhibits high accuracy.
Key words：Spatial heterodyne spectroscopy;Instrumental line shape;Tunable laser;Full width at half maximum
熊 伟1, 2, 3，施海亮2，俞能海1, 2 . 空间外差干涉光谱仪仪器线型函数测量新方法研究 [J]. 光谱学与光谱分析, 2015, 35(01): 267-271.
XIONG Wei1, 2, 3, SHI Hai-liang2, YU Neng-hai1, 2 . Study on a New Method for Instrumental Line Shape Measurement of Spatial Heterodyne Interference Spectrometer. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(01): 267-271.
[1] Harlander J. Spatial Heterodyne Spectroscopy: Interferometric Performance at any Wavelength without Scanning. Ph D Thesis. University of Wisconsin—Madison, 1991. [2] Lin Yunlong，Shepherd G，Solheim B，et al. Introduction to Spatial Heterdyne Obervations of Water (SHOW) Project and Its Instrument Development(C). ITSC-X Proceedings Beijing(Poster)，China，2005. [3] YE Song(叶 松). Study of Spatial Helerodyne Spectroscopy(空间外差光谱技术研究). Anhui Institute of Optics and Fine Mechanics CAS. PHD(中国科学院安徽光学精密机械研究所博士论文)，2007. [4] Harlander J M，Roesler F L，Cardon J G，et al. Applied Optics, 2002, 41(7): 1343. [5] Christoph R Englert，Michael H Stevens，David E Siskind，et al. Journal of Geophysical Research，2010，115：1. [6] XIONG Wei, SHI Hai-liang, WANG Yuan-jun, et al(熊 伟，施海亮，汪元钧，等). Acta Optica Sinica(光学学报), 2010，30(5)：1511. [7] SHI Hai-liang, XIONG Wei, LUO Hai-yan, et al(施海亮，熊 伟，罗海燕，等). Opto-Electronic Engineering(光电工程), 2013, 40(8): 36. [8] Crisp D, Fisher B M, O’Dell C, et al. Atmos. Meas. Tech. Discuss., 2012, 5：1. [9] WU Jun, WANG Xian-hua, FANG Yong-hua, et al(吴 军, 王先华, 方勇华, 等). Acta Optica Sinica(光学学报), 2011, 31(1): 9. [10] XU Qiu-yun, ZHENG Xiao-bing, ZHANG Wei，et al(徐秋云, 郑小兵, 张 伟, 等). Acta Optica Sinica(光学学报), 2009, 29(5): 1310. [11] SHI Hai-liang, FANG Yong-hua, WU Jun, et al(施海亮, 方勇华, 吴 军, 等). Acta Optica Sinica(光学学报), 2012, 32(5): 1325.
