Abstract

The two-frequency wave function of biphotons generated in the process of spontaneous four-wave mixing in a photonic crystal fiber is studied. A method for estimating the degree of entanglement of biphotons by time-frequency variables is presented and tested experimentally. The degree of spectral anticorrelation of a two-photon wave packet, which can be used as an alternative to the Schmidt and Fedorov parameters for estimating spectral entanglement, is revealed. The results on two-photon interference in a Mach–Zehnder interferometer are used to determine the parameter of spectral anticorrelation for the state generated in the four-wave mixing process in the photonic crystal fiber.

中文翻译：

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光子晶体光纤中产生的光谱纠缠对的双光子干涉

摘要

研究了光子晶体光纤自发四波混频过程中产生的双光子的二频波函数。提出并通过实验测试了一种通过时频变量估计双光子纠缠程度的方法。揭示了双光子波包的光谱反相关程度，可用作估计光谱纠缠的 Schmidt 和 Fedorov 参数的替代方法。马赫-曾德干涉仪中双光子干涉的结果用于确定光子晶体光纤中四波混合过程中产生的状态的光谱反相关参数。