Partially coherent pulsed source with spatiotemporal Lorentz non‐uniform correlation and its propagation properties

doi:10.3969/j.issn.1007-5461.2026.05.010

Abstract

Abstract: Partially coherent pulsed beams are widely used in optical communication, particle manipulation, beam shaping, etc. Based on the coherence theory of nonstationary light fields, a class of partially coherent pulsed sources with both spatial and temporal Lorentz non-uniform correlation, namely the spatiotemporal Lorentz non-uniform correlation (SLNUC) pulsed sources, is proposed in this paper. By using the generalized Huygens-Fresnel diffraction integral, the analytical propagation formula of SLNUC pulsed beams through a spatiotemporal optical system is derived, and the spatiotemporal intensity evolution behavior of SLNUC pulsed beams in a dispersive medium is investigated. The results show that the SLNUC pulsed beams exhibit spatiotemporal self-focusing characteristics during propagation, which is attributed to the unique spatiotemporal coherent structure of the pulsed light source. It is well known that as an optical nonlinear phenomenon, spatiotemporal self-focusing has potential applications in laser micromachining and laser filament formation, which indicates that SLNUC pulsed beams have certain application prospects in related fields.

Key words: optics, pulsed source, light field modulation, Lorentz non-uniform correlation, coherence; propagation

CLC Number:

O436

LIU Zeting , DING Chaoliang , LI Jinhong. Partially coherent pulsed source with spatiotemporal Lorentz non‐uniform correlation and its propagation properties[J]. Chinese Journal of Quantum Electronics, 2026, 43(5): 778-792.

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