Generation of high spectral purity photon-pairs with MgO-doped periodically poled lithium niobate. (5th November 2015)

• Record Type: Journal Article
• Authors: Zhan, Mengying; Sun, Qichao; Xiang, Tong; Chen, Xianfeng
• Is Part Of: Laser physics. Volume 25:Number 12(2015:Dec.)
• Publication Date: 2015-11-05
• Subjects: spectral purity -- Schmidt decomposition -- spontaneous parametric down conversion; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1054-660X/25/12/125203
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: We study the spectral correlation of photon pairs generated via type-II spontaneous parametric down conversion in periodically poled lithium niobate crystals. By performing Schmidt decomposition on the two-photon wavefunction, we calculate the spectral purity of the two-photon state under various pump laser characteristics and doping concentrations of MgO in lithium niobate crystals. Our results show that periodically poled 5% MgO doped lithium niobate is a good candidate to generate photon-pairs with high spectral purity at telecom wavelength.