量子光学学报, 2014, 20 (1): 1, 网络出版: 2014-03-11
不同光场二阶相干度的实验研究
Experimental Investigation of the Second-order Degree of Coherence for the Various Light Fields
二阶相干度 脉冲相干光 单原子 光学偶极力阱 the second order degree of coherence coherent pulse laser single atoms optical diople trap
摘要
基于Hanbury Brown-Twiss (HBT)实验, 我们借助于两个单光子计数模块, 一个50/50分束器和一个快速计数卡(FastCom-P7888)研究了不同光场的二阶相干度。我们首先制备了脉冲相干光, 连续相干光以及单原子发出的单光子源, 并测量这几种不同光场的二阶相干度g(2)(τ)。我们通过测量俘获在磁光阱(MOT)和远失谐偶极阱(FORT)中的单原子在近共振连续激光激发下所辐射的荧光的二阶相干度,分别得到了g(2)(τ=0)=0.08和g(2)(τ=0)=0.09, 借助于实验中产生的脉冲光与单原子, 接下来我们将进行触发式单光子源的实验研究。
Abstract
We investigated the properties of various light fields based on the Hanbury-Brown-Twiss (HBT) experiment consisted by two single-photon-counting modules (SPCMs), one 50/50 beam splitter and the Fast-Com P7888 card.Having experimentally investigated the second-order degree of coherence g2(τ) for the continuous-wave and the pulse lasers and the single-photon source generated by single atom, we confirmed the experiment results by theoretical analysis.Specially, we have achieved a high quality of single-photon source based on single atom trapped in the magnetic-optical trap and the far-off-resonance trap with g(2)(τ=0)=0.09 and g(2)(τ=0)=0.08 ,respectively.Using the pulse laser and the single atom, we can perform the triggered single photon experiment.
刁文婷, 何军, 刘贝, 王杰英, 王军民. 不同光场二阶相干度的实验研究[J]. 量子光学学报, 2014, 20(1): 1. DIAO Wen-ting, HE Jun, LIU Bei, WANG Jie-ying, WANG Jun-min. Experimental Investigation of the Second-order Degree of Coherence for the Various Light Fields[J]. Acta Sinica Quantum Optica, 2014, 20(1): 1.