| Original Articles |
|
|
|
|
Spatial Interference Effect of Two-Photon in Femtosecond-Pulse
Pumped Spontaneous Parametric Down-Conversion |
| LU Shu-Long;SUN Bao-Quan;LIU Bo;JIANG De-Sheng;XU Zhong-Ying |
| National Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083 |
|
| Cite this article: |
|
LU Shu-Long, SUN Bao-Quan, LIU Bo et al 2002 Chin. Phys. Lett. 19 345-347 |
|
|
|
|
Abstract 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. Different from the case of continuous wave laser pump, broadband pulse laser pump can submerge an interference pattern. In order to obtain high visibility interference pattern, we used a lens with tunable focal length and two interference filters to eliminate the effects of broadband pump laser. It is proved that the process of two-photon direct interference is a post-selection process.
|
| Keywords:
42.65.Ky
42.50.Dv
42.65.Re
|
|
|
Published: 01 March 2002
|
|
| PACS: |
42.65.Ky
|
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
|
| |
42.50.Dv
|
(Quantum state engineering and measurements)
|
| |
42.65.Re
|
(Ultrafast processes; optical pulse generation and pulse compression)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
