Control the orbital angular momentum in third-harmonic generation using quasi-phase-matching

Manipulating photon's orbital angular momentum (OAM) through nonlinear interactions has drawn increasing research interests in recent years. In this work, we propose a scheme to control the OAM of the third harmonic wave through two cascaded second-order nonlinear processes. A Gaussian beam was...

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Bibliographic Details
Published in:Optics express 2018-06, Vol.26 (13), p.17563-17570
Main Authors: Xu, Zhou, Lin, Zhongyu, Ye, Zhilin, Chen, Yan, Hu, Xiaopeng, Wu, Yaodong, Zhang, Yong, Chen, Peng, Hu, Wei, Lu, Yanqing, Xiao, Min, Zhu, Shining
Format: Article
Language:English
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Summary:Manipulating photon's orbital angular momentum (OAM) through nonlinear interactions has drawn increasing research interests in recent years. In this work, we propose a scheme to control the OAM of the third harmonic wave through two cascaded second-order nonlinear processes. A Gaussian beam was frequency doubled at the first stage. Subsequent sum frequency mixing of the Gaussian second harmonic wave and an orthogonal-polarized Laguerre-Gaussian-like fundamental wave generate the third harmonic wave, which carries the same OAM as that of the Laguerre-Gaussian-like fundamental wave. In this experiment, we demonstrated controlling the OAM of the third harmonic wave in a tandem periodically-poled LiTaO optical superlattice, and the results are in accordance with theoretical predictions.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.26.017563