Ultrabright femtosecond source of biphotons based on a spatial mode inverter

被引：2
|
作者：
Jarutis, V [1 ]
Juodkazis, S [1 ]
Mizeikis, V [1 ]
Sasaki, K [1 ]
Misawa, H [1 ]
机构：
[1] Hokkaido Univ, Res Inst Elect Sci, Japan Sci & Technol Corp, Core Res Evolut Sci & Technol, Sapporo, Hokkaido 0600812, Japan
来源：
OPTICS LETTERS | 2005年 / 30卷 / 03期
关键词：
D O I：
10.1364/OL.30.000317
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A 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 beta-barium borate crystal pumped by second-harmonic radiation from a Ti:sapphire laser were obtained. (C) 2005 Optical Society of America.
引用
收藏
页码：317 / 319
页数：3
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