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Design and engineering development of single-mode fiber coupling system for Laser Doppler Velocity Radar
Author(s): Yaowu Kuang; Zhiping He; Weiming Xu; Rong Shu
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Paper Abstract

Coupling of scattering light in space into a single-mode fiber is a key technology in the process of developing the Laser Doppler Velocity Radar. In order to make sure that the radar can get the longest detect distance, we have discussed the method of determining the key parameters of the receiver/transmitter common-path optical system based on the singlemode fiber coupling, from the points of laser radar detect distance equation, principle of single-mode fiber coupling efficiency reach maximum, and considerations of laser transmitter. In the engineering development process of an laser Doppler velocity radar, we have designed the optical system which fulfills the requirement of detect distance bigger than 3Km, then given out simulation results of single-mode fiber coupling efficiency versus lens spherical aberration, fiber defocus and fiber tilt. The tolerance analysis result indicates that the coupling efficiency will bigger than 52% under the usual levels of optical manufacture and assembly. At last we designed specialized equipment for testing the single-mode fiber coupling efficiency of the system we developed, the results showed that after mechanical vibration and thermal experiments, the single-mode coupling efficiency is 55.9%, and in the operating temperature range of 20±3°C, the lowest coupling efficiency is 45%, which is still bigger than 35% as the system required to make sure the detect distance bigger than 3Km.

Paper Details

Date Published: 24 October 2017
PDF: 11 pages
Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104623V (24 October 2017); doi: 10.1117/12.2285287
Show Author Affiliations
Yaowu Kuang, Shanghai Institute of Technical Physics (China)
Univ. of Chinese Academy of Sciences (China)
Zhiping He, Shanghai Institute of Technical Physics (China)
Weiming Xu, Shanghai Institute of Technical Physics (China)
Rong Shu, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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