RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Two-beam coupling in the production of quantum correlated images by four-wave mixing

TitleTwo-beam coupling in the production of quantum correlated images by four-wave mixing
Publication TypeJournal Article
Year of Publication2021
AuthorsM-C. Wu, N. R. Brewer, R. W. Speirs, K. M. Jones, and P. D. Lett
JournalOpt. Express
Volume29
Pagination16665-16675
Date PublishedMAY 24
Type of ArticleArticle
ISSN1094-4087
Abstract

We investigate the effect of 2-beam coupling in different imaging geometries in generating intensity-difference squeezing from four-wave mixing (4WM) in Rb atomic vapors. A recently-introduced dual-seeding technique can cancel out the classical noise in a seeded four-wave mixing process. This dual-seeding technique, however, can introduce new complications that involve 2-beam coupling between different seeded spatial modes in the atomic vapor and can ruin squeezing at frequencies on the order of the atomic linewidth and below. This complicates some forms of quantum imaging using these systems. Here we show that seeding the 4WM process with skew rays can eliminate the excess noise caused by 2-beam coupling. To avoid 2-beam coupling in bright, seeded images, it is important to re-image the object in the gain medium, instead of focussing through it. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

DOI10.1364/OE.424392