Ultrabright femtosecond source of biphotons based on a spatial mode inverter
journal contribution
posted on 2024-07-09, 23:12 authored by Vygandas Jarutis, Saulius JuodkazisSaulius Juodkazis, Vygantas Mizeikis, Keiji Sasaki, Hiroaki MisawaA method of enhancing the efficiency of entangled biphoton sources based on a type II femtosecond spontaneous parametric downconversion (SPDC) process is proposed and implemented experimentally. Enhancement is obtained by mode inversion of one of the SPDC output beams, which allows the beams to overlap completely, thus maximizing the number of SPDC photon pairs with optimum spatiotemporal overlap. By use of this method, biphoton count rates as high as 16 kHz from a single 0.5-mm-long β-barium borate crystal pumped by second-harmonic radiation from a Ti:sapphire laser were obtained.
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0146-9592Journal title
Optics LettersVolume
30Issue
3Pagination
2 ppPublisher
Optical Society of AmericaCopyright statement
Copyright © 2005 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/ol.30.000317. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.Language
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