带球差的部分相干光束在海洋湍流中传输的光强特性

利用广义惠更斯-菲涅耳衍射积分公式得到了带球差的部分相干光束在海洋湍流中传输的光强表达式,通过数值计算研究了带球差的部分相干光束在海洋湍流中传输的光强特性。研究表明：均方温度耗散率χT较大、单位质量液体中的湍流动能的耗散率ε较小或者温度和盐度波动的相对强度w较大时，海洋湍流对光束的扩展影响较大；χT较小、ε较大或者w较小时，海洋湍流对光束的扩展影响较小；光束的相干长度越小，或者球差越大，光束越扩散。光束在海洋中传输时，球差参数对光束扩散的影响明显小于海洋参数对光束扩散的影响。

Abstract

A light intensity expression of the partially coherent beam with spherical aberration propagating in the oceanic turbulence is obtained by the extended Huygens-Fresnel diffraction integral formula. Light intensity characteristics of the partially coherent beams with spherical aberration propagating in the seawater are investigated by means of numerical calculation. Results show that the larger the mean square temperature dissipation rate χT is, the smaller the dissipation rate of turbulence kinetic energy of unit mass liquid ε is, or the larger the relative intensity of temperature and salinity fluctuations w is, the more obvious the effect of oceanic turbulence on the expansion of the beam is. The smaller the χT is, the larger the ε is, or the smaller the w is, the smaller impact of oceanic turbulence on the beam expansion is. At the same time, the smaller the coherence length of the beam is, or the greater the spherical aberration is, the more the beam spread is. However, the influences of the spherical aberration parameters on the diffusion of the laser are significantly weaker than that of the oceanic parameters when the beam propagates in the seawater.

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张艳红, 刘永欣, 陈子阳. 带球差的部分相干光束在海洋湍流中传输的光强特性[J]. 激光与光电子学进展, 2017, 54(11): 110103. Zhang Yanhong, Liu Yongxin, Chen Ziyang. Light Intensity Characteristics of Propagation Partially Coherent Beams with Spherical Aberration in Oceanic Turbulence[J]. Laser & Optoelectronics Progress, 2017, 54(11): 110103.

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