摘要
Frequency tunable continuous variable （CV） entangled optical beams are experimentally demonstrated from a non-degenerate optical parametric oscillator working above the threshold.The measured correlation variances of amplitude and phase quadratures are 3.2 and 1.5 dB,respectively,below the corresponding shot noise level （SNL） in the tuning range of 580 GHz （2.25 nm）.The frequency tuning is realized by simply controlling the temperature of the nonlinear crystal.
Frequency tunable continuous variable （CV） entangled optical beams are experimentally demonstrated from a non-degenerate optical parametric oscillator working above the threshold.The measured correlation variances of amplitude and phase quadratures are 3.2 and 1.5 dB,respectively,below the corresponding shot noise level （SNL） in the tuning range of 580 GHz （2.25 nm）.The frequency tuning is realized by simply controlling the temperature of the nonlinear crystal.
基金
supported by the National Natural Science Foundation of China (Nos.60736040 and 11074157)
the NSFC Project for Excellent Research Team (No.60821004)
the National Basic Research Program of China (No.2010CB923103)
