Optical third harmonic generation during femtosecond pulse diffraction in a Bragg grating

被引：17
|
作者：
Juodkazis, S
Gaizauskas, E
Jarutis, V
Reif, J
Matsuo, S
Misawa, H [1 ]
机构：
[1] Hokkaido Univ, CREST JST, Sapporo, Hokkaido 0010021, Japan
[2] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010021, Japan
[3] Vilnius State Univ, LT-2040 Vilnius, Lithuania
[4] Brandenburg Tech Univ Cottbus, D-03044 Cottbus, Germany
[5] Univ Tokushima, Dept Ecosyst Engn, Tokushima 7708506, Japan
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2006年 / 39卷 / 01期
关键词：
D O I：
10.1088/0022-3727/39/1/009
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on a novel phenomenon occurring when ultrashort laser pulses are diffracted in a Bragg grating recorded in a photo-thermo-refractive glass: two intense beams at the third harmonic of the incident laser frequency appear between the direct and the diffracted laser beams. A high conversion efficiency of about 0.04% at an incident intensity of 5 x 10(11) W cm(-2) in a 1 mm thick grating is attributed to self-phase matching for the third harmonic generation via Cherenkov radiation from the interfering third order polarization of the incident and diffracted beams. It is assumed that this is a general phenomenon for diffraction in a volume grating.
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页码：50 / 53
页数：4
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