Experimental investigation about the influence of pump phase noise on phase-correlation of output optical fields from a non-degenerate parametric oscillatorDong Wang, Yana Shang, Zhihui Yan, Wenzhe Wang, Xiaojun Jia, Changde Xie and Kunchi Peng
The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University - Taiyuan, 030006, PRC
received 14 September 2007; accepted in final form 28 February 2008; published April 2008
published online 28 March 2008
The influence of the phase fluctuation of the pump laser on the phase correlation between the signal and idler modes of the output fields from a non-degenerate optical parametric oscillator operating above oscillation threshold was experimentally investigated. The noise spectra of the intensity-difference and the phase-sum of the entangled optical beams were measured with a pair of unbalanced fiber Mach-Zehnder interferometers specifically designed. The experimental results prove the previous theoretical prediction and are in reasonable agreement with the calculation based on semiclassical theory involving the phase fluctuation of pump laser.
42.50.-p - Quantum optics.
42.65.Yj - Optical parametric oscillators and amplifiers.
42.65.Lm - Parametric down conversion and production of entangled photons.
© EPLA 2008