文献类型：期刊文献

英文题名：Mode hitching in traveling-wave optical parametric amplification

作者：Kelly, Joseph[1,2];Fradgley, Eleanor[1];Zhang, Lida[1,3];Boyer, Vincent[1]

机构：[1]Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, England;[2]Kings Coll London, Dept Phys, London WC2R 2LS, England;[3]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2025

卷号：111

期号：3

外文期刊名：PHYSICAL REVIEW A

收录：;EI(收录号：20251318128345);WOS:【SCI-EXPANDED(收录号:WOS:001459727400005)】；

基金：J.K. and E.F. acknowledge doctoral training funding from EPSRC.

语种：英文

外文关键词：Optical parametric amplifiers - Parametric amplifiers - Squeezed light

摘要：Optical parametric amplifiers (OPAs) in traveling-wave configuration can generate localized spatial quantum correlations between a signal and an idler beam, a useful resource for quantum imaging. To characterize the spatial correspondence between the optical modes of the signal and those of the idler, we look at the classical transverse dynamics of these beams when they propagate in a generic thick OPA at a nominally small angle. In these conditions, the beams tend to copropagate while maintaining a fixed separation, a phenomenon that we term hitching. We develop a model for hitching, validated by a numerical simulation, and provide an experimental demonstration using four-wave mixing in a hot atomic vapor. They show that the OPA gain is the primary influence on the final hitching distance. These results have implications for the generation of multi-spatial-mode squeezed light for quantum imaging applications, where the exact spatial correlations between the quantum fluctuations of the signal and the idler are of prime importance.