Spatial Interference Effect of Two—Photon in Femtosecond—Pules Pumped Spontaneous Parametric Down—Conversion

作     者：陆书龙 孙宝权 等 

作者机构：NationalLaboratoryforSuperlatticesandMicrostructuresInstituteofSemiconductorsChineseAcademyofSciencesP.O.Box912Beijing100083 NationalLaboratoryforSuperlatticesandMicrostructuresInstituteofSemicon 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2002年第19卷第3期

页      面：345-347页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：中国科学院知识创新工程项目 

主　　题：Continuous wave lasers 

摘      要：We have used the transverse correlated properties of the entangled photon pairs generated in the process of spontaneous parametric down-conversion, which is pumped by a femtosecond pulse laser, to perform Young s interference experiment. Unlike the case of a continuous wave laser pump, a broadband pulse laser pump can submerge an interference pattern. In order to obtain a high visibility interference pattern, we used a lens with a tunable focal length and two interference filters to eliminate the effects of the broadband pump laser. It is proven that the process of two-photon direct interference is a post-selection process.