相干激光雷达平衡式相干探测技术研究

详细信息

Balance coherent detection technology of coherent lidar

1.
Military Representative Office of Chinese People's Liberation Army Accredited in No.209 Institute, Chengdu 610041, China;
2.
Southwest Institute of Technical Physics, Chengdu 610041, China

摘要: 为了分析影响平衡式相干探测信噪比的因素,采用数学模型推导了平衡式相干探测原理和信噪比公式,分析了影响平衡式相干探测信噪比的因素,研制了用于相干激光雷达信号接收的平衡式激光探测器,并通过相干雷达样机,完成了气溶胶粒子发生米氏散射回波信号的探测。结果表明,研制的平衡式激光探测器具有非常低的噪声和高探测灵敏度特性,能较好地探测出大气中气溶胶粒子发生米氏散射的激光回波信号。
- 激光技术 /
- 探测器 /
- 平衡式相干探测 /
- 相干激光雷达 /
- 多普勒频移
Abstract: In order to analyze the influence factors of signal-to-noise ratio(SNR) of balanced coherent detection, balanced coherent detection process was studied and the SNR formula was derived based on the mathematical model. A balanced laser detector for signal receiving was developed, and Mie scattering echo signal of aerosol particles was detected by means of the coherent radar prototype. The results show that balanced laser detector is with very low noise and high sensitivity, and can detect the laser echo signal of Mie scattering of aerosol particles.
- laser technique /
- detector /
- balance coherent detection /
- coherent lidar /
- Doppler frequency shift

[1]	DAI Y J. The principle of lidar[M].Beijing:National Defence Industry Press, 2002:256-280(in Chinese).
[2]	LIU Zh Sh, WANG Zh J, WU S H, et al. Fine measuring technique and application for sea surface wind by mobile Doppler wind lidar[J]. Optical Engineering, 2009, 48(6): 066002.
[3]	CAIOU J P, VALLLA M, CANAT G, et al. New effective sources for coherent lidars[J]. Proceedings of the SPIE, 2007, 6750:675007.
[4]	PEARSON G N, EACOCK J R. A fiber-based coherent Doppler lidar for atmospheric minitoring[J]. Proceedings of the SPIE,2002,4484:51-57.
[5]	LINELOW P. Fiber based coherent lidars for remote wind sensing[D]. Copenhagen, Denmark:Technical University of Denmark, 2007:31-72.
[6]	KAMEYAMA S, ANDO T, ASAKA K, et al. Compact all-fiber pulse coherent Doppler lidar system for wind sensing[J]. Appled Optics, 2007, 46(11):1953-1962.
[7]	GAO L, WANG Ch H, LI Y Ch, et al. Balance coherent detect experiment of 1.55m wind lidar[J].Acta Photonica Sinica, 2010, 39(6):1064-1069(in Chinese).
[8]	ASAKA K, TAKAYUKI Y, YOSHIHIT O H. 1.5m eye safe coherent lidar system for wind velocity measurement[J]. Proceedings of the SPIE, 2001,4153:321-328.
[9]	FINK D. Coherent detection signal-to-noise[J]. Applied Optics, 1975,14(3): 689-690.
[10]	JOSHI A, BECKER D, DATTA Sh. Low noise InGaAs balanced pin photo-receiver for space based remote sensing applications at 2 micron wave length[J]. Proceedings of the SPIE, 2008,7095:1-8.

1.	刘延文，孙学金，张传亮，李绍辉. 非相干多普勒测风激光雷达鉴频算法. 激光与红外. 2018(10): 1204-1213 . 百度学术
2.	单聪淼，孙华燕，赵延仲. 基于M-Z干涉的相干高斯光束远场干涉图样研究. 激光技术. 2017(01): 113-119 . 本站查看
3.	彭涛，陶刚，姜勇，周鼎富. 激光测风雷达折射式收发同轴光学天线设计. 激光技术. 2017(05): 684-687 . 本站查看
4.	王晓维，梁应剑，李翔，龙彦志，梅运桥. 基于光学多普勒频移的低空速测量方法研究. 激光技术. 2016(05): 629-632 . 本站查看
5.	郭商勇，胡雄，闫召爱，程永强，郭文杰. 国外星载激光雷达研究进展. 激光技术. 2016(05): 772-778 . 本站查看