Tunable Twin Beam Generation by Beam Coupling in Photorefractive Media

JI Xuan-mang, 王金来 Wang Jinlai, Jinsong Liu

Vladimir P. Kamenov

Mark E. Saffman

I propose a new approach to generation of sub-Poissonian twin beams. A perturbative analysis shows that frequency dependent redistribution of fluctuations between photorefractively coupled beams results in output beams with sub shot noise intensity correlations.

M. D. Ewbank

Mark E. Saffman

Quantum noise reduction by beam coupling inphotorefractive mediaMark SaffmanDepartment of Optics and Fluid Dynamics,RisO National Laboratory, DK-4000 Roskilde, Denmarke-mail: saffman@risoe.dkABSTRACTI propose a new approach to generation of sub-Poissonian twin beams. A perturbative analysisshows that frequency dependent redistribution of fluctuations between photorefractivelycoupled beams results in output beams with sub shot noise intensity correlations.Keywords: quantum optics, squeezing, photorefractives1. INTRODUCTIONTwin beams that exhibit intensity correlations below the shot noise limit have been generated

A. V. Knyazkov, M. N. Lobanov