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Proceedings Paper

Comparisons between field-widen Michelson interferometer and Fabry-Perot interferometer as the spectroscopic filter in high spectral resolution lidar
Author(s): Zhongtao Cheng; Dong Liu; Yongying Yang; Hanlu Huang; Yibing Shen
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Paper Abstract

One of the pivotal challenges in high spectral resolution lidars (HSRLs) is the spectral discrimination process, which brings about more straightforward and accurate retrieval without a priori assumptions in contrast to standard backscatter lidars. Inteferometric filters such as Fabry-Perot interferometer (FPI) has shown great convenience for spectrally separating the Rayleigh and Mie scattered elements in HSRL returned signals. Based on interference of two incident beams, the field -widen Michelson interferometer (FWMI) may be also the same potential in this application as FPI in spite of some performance differences. In this paper, we concentrate on the performance comparisons of FWMI with FPI as spectroscopic filter in HSRL from the inspections of spectral discrimination characteristic, field of view (FOV) tolerance, the efficiency of power collection, etc. All these analytical comparisons are quantificational and will be beneficial to reasonable choice among the two optical filters for HSRL. The results indicate that in spite of a litter lower transmittance when processing the radiation with very small divergence and more rigorous tolerance for temperature stability and surface flatness compared with FPI, FWMI is still very competent in this spectral filtering process for its remarkable spectral discrimination characteristic and efficient photons collective ability which attributes to its field widen design and intrinsically outstanding spectral separation performance.

Paper Details

Date Published: 19 September 2013
PDF: 10 pages
Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89051W (19 September 2013); doi: 10.1117/12.2034670
Show Author Affiliations
Zhongtao Cheng, Zhejiang Univ. (China)
Dong Liu, Zhejiang Univ. (China)
Yongying Yang, Zhejiang Univ. (China)
Hanlu Huang, Zhejiang Univ. (China)
Yibing Shen, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 8905:
International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications
Farzin Amzajerdian; Astrid Aksnes; Weibiao Chen; Chunqing Gao; Yongchao Zheng; Cheng Wang, Editor(s)

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