Semiconductor Laser Experiments with Rubidium Vapor with Applications to Fundamental and Applied Physics

M. Têtu, Normand Cyr, Bernard Villeneuve +3 more

G. Offermans

王旭成, 成华东, 肖玲 +4 more

We cool 85Rb atoms in an integrating sphere directly from a vapor background using diffuse light generated by multiple reflections of laser beams in the inner surface of the integrating sphere. We compare and analyze the different features of cold 85Rb atoms and cold 87Rb atoms in diffuse light cooling, which are important in applying 85Rb and 87Rb isotopes in many experiments on testing fundamental physics.

Zhongzhong Qin, Jietai Jing, Jun Zhou +4 more

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.

Yajuan Wang, Bailiang Pan, Qi Zhu +1 more

Xucheng Wang Xucheng Wang, Hua-Dong Cheng, Ling Xiao +4 more

We cool 85 Rb atoms in an integrating sphere directly from a vapor background using diffuse light generated by multiple reflections of laser beams in the inner surface of the integrating sphere.We compare and analyze the different features of cold 85 Rb atoms and cold 87 Rb atoms in diffuse light cooling, which are important in applying 85 Rb and 87 Rb isotopes in many experiments on testing fundamental physics.