Dynamics of a paired optical vortex generated by second-harmonic generation

Toda, Y.; Honda, S.; Morita, R.

Optics Express, 2010, 18(17), 17796-17804

Permalink : https://hdl.handle.net/2115/47955

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アクセス権	open access
URI	https://hdl.handle.net/2115/47955
タイトル	Dynamics of a paired optical vortex generated by second-harmonic generation
著者	Toda, Y. ; Honda, S. ; Morita, R.
e-Rad_Researcher 00313106 著者名 Toda, Y.
著者名 Honda, S.
著者名 Morita, R.
言語	英語
発行日	2010-08-16
出版者	Optical Society of America
収録物名	Optics Express
巻(号)	18(17)
ページ	17796-17804
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	© 2010 Optical Society of America
EISSN	1094-4087
関連情報	PMID 20721167
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1364/OE.18.017796