时空余弦多高斯关联部分相干脉冲光束的传输特性

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中图分类号：O436文献标志码：A

Abstract： Based on the coherence theory of partially coherent light field， a new class of partially coherent pulsed beams with spatially cosine-multi-Gaussian and temporally cosine-multi-Gaussian correlations，namelyspatiotemporal cosine-multi-Gaussiancorrelationpartiallycoherent （STCMGCPC） pulsed beams， is introduced. By use of the generalized Huygens-Fresnel diffraction integral， the analytical propagation formula of partially coherent pulse beam with spatiotemporal cosine-multi-Gaussian time-space correlation through the spatiotemporal ABCD optical system was derived.Taking the still water as a typical example of dispersive medium，the evolution of spatiotemporal intensity of STCMGCPC pulsed beams was investigated. The results showed that STCMGCPC pulsed beams exhibited spatiotemporal self-spliting and self-focusing simultaneously，and the physical explanation of the phenomenon was attributed to the special spatiotemporal coherent structure of the pulsed light source and pulse chirp. The research findings have potential application value in the field of underwater laser communication and imaging.

Keywords： coherence; spatiotemporal intensity; partially coherent pulsed beam; self-splitting

引言

众所周知，光源的相干性对相干光场的强度分布起着非常重要的作用。（剩余9972字）