Orbital angular momentum in noncollinear second-harmonic generation by off-axis vortex beams

被引：29
|
作者：
Bovino, Fabio Antonio [1 ]
Braccini, Matteo [2 ]
Giardina, Maurizio [1 ]
Sibilia, Concita [2 ]
机构：
[1] Selex SI, Quantum Opt Lab, I-16154 Genoa, Italy
[2] Univ Roma La Sapienza, Dipartimento Sci Base & Applicate Ingn, I-00161 Rome, Italy
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2011年 / 28卷 / 11期
关键词：
SPIRAL PHASE PLATES; OPTICAL VORTICES; LIGHT; DISLOCATIONS; WAVELENGTHS; CRYSTALS; DYNAMICS; MODES;
D O I：
10.1364/JOSAB.28.002806
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We experimentally study the behavior of orbital angular momentum (OAM) of light in a noncollinear second-harmonic generation process. The experiment is performed by using a Type I BBO crystal under phase-matching conditions with femtosecond pumping fields at 830nm. Two specular off-axis vortex beams carrying fractional OAM at the fundamental frequency are used. We analyze the behavior of the OAM of the second-harmonic (SH) signal when the optical vortex of each input field at the FF is displaced from the beam's axis. We obtain different spatial configurations of the SH field, always carrying the same zero angular momentum. (C) 2011 Optical Society of America
引用
收藏
页码：2806 / 2811
页数：6
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