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Dynamics of a paired optical vortex generated by second-harmonic generation
Title: | Dynamics of a paired optical vortex generated by second-harmonic generation |
Authors: | Toda, Y. Browse this author →KAKEN DB | Honda, S. Browse this author | Morita, R. Browse this author |
Issue Date: | 16-Aug-2010 |
Publisher: | Optical Society of America |
Journal Title: | Optics Express |
Volume: | 18 |
Issue: | 17 |
Start Page: | 17796 |
End Page: | 17804 |
Publisher DOI: | 10.1364/OE.18.017796 |
PMID: | 20721167 |
Abstract: | We study the dynamics of a paired optical vortex (OV) generated by second-harmonic generation (SHG) using sub-picosecond pulses. By changing the position of a thin nonlinear crystal along the propagation direction, we observe a rotation of two vortices with changing separation distance. The dynamics is well explained by SHG with a beam walk-off, which introduces a contamination of zero-order Laguerre-Gaussian beam (LG0) together with topological charge doubling. The quantitative analysis indicates that the rotation angle of the OVs manifests the Gouy phase while the splitting provides the walk-off angle of the crystal. We also show that the subtraction of LG0 is realized by the superposition of LG0 with an anti-balanced phase in the pump. |
Rights: | © 2010 Optical Society of America |
Type: | article |
URI: | http://hdl.handle.net/2115/47955 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 戸田 泰則
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