Conical ring beam achieved via degenerated optical parametric generation in tightly focused quasi-phase matching conditions

Wei Zhao; Chuan Guo; Lingwei Zhao; Lei Liu; Hongyan Wang; Xiaojun Xu

doi:10.1117/12.2524397

29 March 2019 Conical ring beam achieved via degenerated optical parametric generation in tightly focused quasi-phase matching conditions

Wei Zhao, Chuan Guo, Lingwei Zhao, Lei Liu, Hongyan Wang, Xiaojun Xu

Author Affiliations +

Proceedings Volume 11046, Fifth International Symposium on Laser Interaction with Matter; 110460D (2019) https://doi.org/10.1117/12.2524397
Event: Fifth International Symposium on Laser Interaction with Matter, 2018, Changsha, China

Abstract

Ring or conical light beams show great potential in many applications. We report on achievement of multi-ring-shaped conical beams through degenerated optical parametric generation (OPG) with tightly focused Gaussian pump beam in periodic polarized lithium niobate (PPLN) crystal. We observed continuous beam spatial pattern variation from multi to single ring and normal non-hollow beams by crystal temperature tuning. We attributed the experimental results to the effective polarized period changing under tightly focusing. This unique feature would exist in any quasi-phase matching processes and may find applications in optical trapping, manipulation, and even quantum field.

Citation Download Citation

Wei Zhao, Chuan Guo, Lingwei Zhao, Lei Liu, Hongyan Wang, and Xiaojun Xu "Conical ring beam achieved via degenerated optical parametric generation in tightly focused quasi-phase matching conditions", Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 110460D (29 March 2019); https://doi.org/10.1117/12.2524397

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