Tunable third harmonic generation of vortex beams in an optical superlattice | Zendy

Yu Wu | Zendy; Rui Ni | Zendy; Zhou Xu | Zendy; Yaodong Wu | Zendy; Xinyuan Fang | Zendy; Dan Wei | Zendy; Xiao Hu | Zendy; Yong Zhang | Zendy; Min Xiao | Zendy; Shining Zhu | Zendy

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Tunable third harmonic generation of vortex beams in an optical superlattice

Author(s) -

Yu Wu,

Rui Ni,

Zhou Xu,

Yaodong Wu,

Xinyuan Fang,

Dan Wei,

Xiao Hu,

Yong Zhang,

Min Xiao,

Shining Zhu

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.030820

Subject(s) - optics , superlattice , second harmonic generation , sum frequency generation , optical vortex , nonlinear optics , high harmonic generation , materials science , optoelectronics , vortex , physics , laser , beam (structure) , thermodynamics

We report generation of tunable vortex beams in the blue spectral range, with a 3.3 nm spectral tuning range, by frequency tripling of the near-infrared (IR) wave at around 1.34 um in a LiTaO 3 optical superlattice. The nonlinear crystal used in this work has a chirped dual-periodical structure which can provide two expanded reciprocal vectors for tunable performance of the cascaded third harmonic generation (THG). The maximum THG efficiency reaches about 1.4%.

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