光学学报, 1987, 7 (9): 844, 网络出版: 2011-09-20
湍流大气中反射光束的扩展
Beam spread induced by atmospheric turbulence in a folded path
摘要
本文基于推广的惠更斯-菲涅耳原理,利用“平方近似”假设,导得湍流大气中被反射激光束扩展的表达式,并对反射光束的扩展特性作了讨论。证实了平面镜反射光束的扩展存在放大效应,角反射器反射光束的扩展存在自补偿效应。理论公式还表明,利用长波长激光及使用较大的发射、反射孔径,可以减小反射光束的扩展。
Abstract
On the basis of extended Huygens-Fresnel principle and quadratic approximation, general expressions of the beam spread reflected from a target in a turbulent atmosphere are devivod. Tho properties of reflected beam spread are investigated. It is found that there exist "amplification" and "self-compensation" of beam spread in the reflection from a mirror and a corner cube reflector, respectively. Calcutations show that the spread can be reduced by using a long-wavelength laser as well as large transmitting and reflection radii.
冯岳忠, 宋正芳. 湍流大气中反射光束的扩展[J]. 光学学报, 1987, 7(9): 844. FENG YUEZHONG, SOMG ZHENGFANG. Beam spread induced by atmospheric turbulence in a folded path[J]. Acta Optica Sinica, 1987, 7(9): 844.