|
| 时空余弦多高斯关联部分相干脉冲光束的传输特性 |
| Propagation properties of spatiotemporal cosine-multi-Gaussian correlation partially coherent pulsed beams |
| 投稿时间：2025-04-02 |
| DOI：10.3969/j.issn.1005-5630.202504020068 |
| 中文关键词: 相干性 时空强度 部分相干脉冲光束 自分裂 |
| 英文关键词:coherence spatiotemporal intensity partially coherent pulsed beam self-splitting |
| 基金项目:国家自然科学基金面上项目(12174171) |
|
| 摘要点击次数: 1286 |
| 全文下载次数: 249 |
| 中文摘要: |
| 基于部分相干光场的相干理论，介绍了一类新的具有空间余弦–多高斯和时间余弦–多高斯关联的部分相干脉冲光束，即时空余弦多高斯关联部分相干（spatiotemporal cosine-multi-Gaussian correlation partially coherent，STCMGCPC）脉冲光束。利用广义惠更斯–菲涅尔衍射积分公式，推导出了STCMGCPC脉冲光束通过时空ABCD光学系统的解析传输公式。以静止的水作为色散介质的实例，研究了STCMGCPC脉冲光束的时空强度演化特性。研究结果表明，STCMGCPC脉冲光束同时表现出时空自分裂和自聚焦现象，出现这些现象的物理原因是脉冲光束特殊的时空相干结构和脉冲啁啾的相互作用。该研究结果在水下激光通信和成像领域具有潜在应用价值。 |
| 英文摘要: |
| 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, namely spatiotemporal cosine-multi-Gaussian correlation partially coherent (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-splitting 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. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
