title: Compact diode-laser-pumped quantum light source based on four-wave mixing in hot rubidium vapor.
abstract: Using a nondegenerate four-wave mixing process in hot rubidium vapor, we demonstrate a compact diode-laser-pumped system for the generation of intensity-difference squeezing down to 8 kHz with a maximum squeezing of -7 dB. To the best of our knowledge, this is the first demonstration of kilohertz-level intensity-difference squeezing using a semiconductor laser as the pump source. This scheme is of interest for experiments involving atomic ensembles, quantum communications, and precision measurements. The diode-laser-pumped system would extend the range of possible applications for squeezing due to its low cost, ease of operation, and ease of integration.
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.
authors.forename: Zhongzhong
authors.initials: Z
authors.lastname: Qin
authors.forename: Jietai
authors.initials: J
authors.lastname: Jing
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.forename: Cunjin
authors.initials: C
authors.lastname: Liu
authors.forename: Raphael C
authors.initials: RC
authors.lastname: Pooser
authors.forename: Zhifan
authors.initials: Z
authors.lastname: Zhou
authors.forename: Weiping
authors.initials: W
authors.lastname: Zhang