Saturation of biphoton generation near atomic
resonance
Chen Peng;Qian Jun;Hu Zheng-Feng;Wang Yu-Zhu
【期刊名称】《中国物理：英文版》 【年(卷),期】2012(021)011
【摘要】We have numerically investigated the biphoton generation rate as a function of several parameters in the spontaneous four-wave mixing in cold atoms.It has been found that the biphoton generation rate can easily reach saturation with the intensity of the coupling laser increasing.The saturation intensity is mainly dependent on the dephasing rate of the ground states,unrelated to the pumping laser.It implies that though the biphoton waveform can be manipulated by the coupling laser,the generation rate of the biphoton cannot increase markedly after the saturation.The saturation effect also suggests that there is an optimal coupling laser for obtaining the largest biphoton generation rate with a sufficiently long coherence time. 【总页数】6页(240-245) 【关键词】
【作者】Chen Peng;Qian Jun;Hu Zheng-Feng;Wang Yu-Zhu
【作者单位】Key Laboratory for Quantum Optics,Center for Cold Atom Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Key Laboratory for
Saturation of biphoton generation near atomic resonance
