Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder

doi:10.1088/1674-1056/23/5/050303

中国物理B ›› 2014, Vol. 23 ›› Issue (5): 50303-050303.doi: 10.1088/1674-1056/23/5/050303

Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder

王保平^a, 王明军^b, 吴振森^c, 李应乐^b, 向宁静^{b c}

a National Key Laboratory of Sciences and Technology on UAV, Northwestern Polytechnical University, Xi'an 710072, China;
b School of Physics and Electronic Engineering, Xianyang Normal College, Xianyang 712000, China;
c School of Science, Xidian University, Xi'an 710071, China

收稿日期:2013-07-16 修回日期:2013-10-07 出版日期:2014-05-15 发布日期:2014-05-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61271110, 60801047, and 61073106), the New Scientific and Technological Star Project of Shaanxi Province, China (Grant No. 2011KJXX39), the Aviation Science Foundation (Grant No. 2011ZC53042), and the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 12Jk0955 and 2014JQ0816).

Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder

Wang Bao-Ping (王保平)^a, Wang Ming-Jun (王明军)^b, Wu Zhen-Sen (吴振森)^c, Li Ying-Le (李应乐)^b, Xiang Ning-Jing (向宁静)^{b c}

a National Key Laboratory of Sciences and Technology on UAV, Northwestern Polytechnical University, Xi'an 710072, China;
b School of Physics and Electronic Engineering, Xianyang Normal College, Xianyang 712000, China;
c School of Science, Xidian University, Xi'an 710071, China

Received:2013-07-16 Revised:2013-10-07 Online:2014-05-15 Published:2014-05-15
Contact: Wang Ming-Jun E-mail:wmjxd@aliyun.com
About author:03.65.Nk; 42.55.Ah; 42.25.Kb; 41.20.-q
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61271110, 60801047, and 61073106), the New Scientific and Technological Star Project of Shaanxi Province, China (Grant No. 2011KJXX39), the Aviation Science Foundation (Grant No. 2011ZC53042), and the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 12Jk0955 and 2014JQ0816).

摘要/Abstract

摘要： Based on laser radar equations, a Doppler shift model of a laser pulse beam scattered by a rotating arbitrary convex target is reported in this paper. The boundary relations between an incident pulse beam and the detected area elements are analyzed by geometric methods. The Doppler shift characteristics of the rotating cone and cylinder are discussed and the difference between the laser pulse beam and the plane wave scattered from the same rotating target is compared accordingly. Numerical simulations show that the Doppler shift is tightly relevant to their dimensions, speeds, and so on. In the same incidence conditions, the pulse beam and plane wave have difference peak values and the same Doppler shift bandwidth. If the waist radius of the pulse beam is larger, the peak value is higher, and the Doppler shifts are proportional to the speed of the rotating target. By virtue of our theoretical model, we probe into the scattered characteristics of the Doppler shifts of a laser pulse beam, which would benefit target identification in national defense.

关键词: scattered characteristics of laser pulse beams, Doppler shift, laser radar, target identification

Abstract: Based on laser radar equations, a Doppler shift model of a laser pulse beam scattered by a rotating arbitrary convex target is reported in this paper. The boundary relations between an incident pulse beam and the detected area elements are analyzed by geometric methods. The Doppler shift characteristics of the rotating cone and cylinder are discussed and the difference between the laser pulse beam and the plane wave scattered from the same rotating target is compared accordingly. Numerical simulations show that the Doppler shift is tightly relevant to their dimensions, speeds, and so on. In the same incidence conditions, the pulse beam and plane wave have difference peak values and the same Doppler shift bandwidth. If the waist radius of the pulse beam is larger, the peak value is higher, and the Doppler shifts are proportional to the speed of the rotating target. By virtue of our theoretical model, we probe into the scattered characteristics of the Doppler shifts of a laser pulse beam, which would benefit target identification in national defense.

Key words: scattered characteristics of laser pulse beams, Doppler shift, laser radar, target identification

中图分类号: (Scattering theory)

03.65.Nk

42.55.Ah (General laser theory) 42.25.Kb (Coherence) 41.20.-q (Applied classical electromagnetism)

王保平, 王明军, 吴振森, 李应乐, 向宁静. Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder[J]. 中国物理B, 2014, 23(5): 50303-050303.

Wang Bao-Ping (王保平), Wang Ming-Jun (王明军), Wu Zhen-Sen (吴振森), Li Ying-Le (李应乐), Xiang Ning-Jing (向宁静). Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder[J]. Chin. Phys. B, 2014, 23(5): 50303-050303.

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Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder

Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder

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