Chinese Optics Letters, 2015, 13 (11): 113001, Published Online: Sep. 13, 2018
Spectral properties of entangled photon pairs generated via quasi-phased-matched spontaneous parametric down-conversion Download: 709次
190.4410 Nonlinear optics, parametric processes 120.3940 Metrology 300.6410 Spectroscopy, multiphoton 040.5250 Photomultipliers
Abstract
The spectral properties of entangled photon pairs generated via quasi-phased matching in spontaneous parametric down-conversion are proposed and demonstrated experimentally. A general mathematical model for evaluating the spectral properties is developed to obtain the spectrum shape and range of down-converted photons. The model takes into account the effects of phase mismatching due to non-ideal pumping and the relationship between crystal periodic modulation function and the incidence angle of the pump beam. The spectrum curve shape is determined by the discrete Fourier transform of a Gaussian pump beam and the integration of parametric down-conversion generated by an individual plane wave. An experiment is carried out with a PPLN non-linear crystal and dispersing optics, which shows a good consistency in their spectral ranges and shapes with our model predictions within the spectrum of 600–633 nm. This therefore illustrates that both the simulation model and the experimental process are reasonable. This novel method has potential applications in high-accuracy calibration in the wide spectrum using correlated photons.
Maopeng Xia, Jianjun Li, Youbo Hu, Wenyang Sheng, Dongyang Gao, Weiwei Pang, Xiaobing Zheng. Spectral properties of entangled photon pairs generated via quasi-phased-matched spontaneous parametric down-conversion[J]. Chinese Optics Letters, 2015, 13(11): 113001.