Back Raman measurements using a broadband and high-resolution mosaic grating spatial heterodyne Raman spectrometer
Received:February 17, 2019  Revised:September 10, 2019  download
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Author NameAffiliationE-mail
QIU Jun Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun Jilin 130033, China
University of Chinese Academy of Sciences, Beijing 100049, China 
jun_chiu@163.com 
QI Xiang-Dong Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun Jilin 130033, China chinagating@263.com 
LI Xiao-Tian Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun Jilin 130033, China lixt_1981@163.com 
Abstract:Spatial heterodyne Raman spectrometer (SHRS) is a new type of static Fourier transform spectrometer, the SHRS has offers multiplex advantages, including high resolution, in a compact, rugged package without moving parts and field widening. The combination of these characteristics makes the SHRS highly suitable for Raman measurements. In a traditional SHRS system, there is the inverse relationship between the bandpass and the spectral resolution,a higher spectral resolution yielding a decrease in the spectral bandpass or vice versa. In the measurements of weak Raman signal, it is necessary for the Raman spectrometer to meet the requirements of wide field of view, high resolution and broadband coverage. In this paper, a field-widened mosaic grating SHRS breadboard is built and described, the calibration procedure is performed, and some broadband backscattering Raman experimental results are given and discussed. It demonstrates that the proposed SHRS technique has good performance for high throughput, high-resolution and broadband backscattering Raman measurements.
keywords:Raman and optical spectroscopy  Laser applications  Optical instruments and equipment  Interferometers
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