Analysis of the generation of photon pairs in periodically poled lithium niobate

Details Analysis of the generation of photon pairs in periodically poled lithium niobate Analysis of the generation of photon pairs in periodically poled lithium niobate

2005-11-14

arxiv.org/abs/quant-ph/0511128v2

Proceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, edited by S

Physics

Quantum Physics

4 pages, 4 figures, uses ws-procs10x7.cls; v2: Sign in equation (5) corrected

Scientific paper

10.1142/9789812773210_0011

The process of spontaneous parametric down-conversion (SPDC) in nonlinear crystals makes it fairly easy to generate entangled photon states. It has been known for some time that the conversion efficiency can be improved by employing quasi-phase-matching in periodically poled crystals. Using two single-photon detectors, we have analyzed the photon pairs generated by SPDC in a periodically poled lithium niobate crystal pumped by a femtosecond laser. Several parameters could be varied in our setup, allowing us to obtain data in close agreement with both thermal and Poissonian photon-pair distributions.

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