Generation of high-energy geometric structured beams by off-axis pumped Nd:YAG/Cr4+:YAG lasers with degenerate resonators

Pi-Hui Tuan; Yen-Hui Hsieh; Hsin-Chih Liang; Kuan-Wei Su; Yung-Fu Chen

doi:10.1117/12.2319158

24 April 2018 Generation of high-energy geometric structured beams by off-axis pumped Nd:YAG/Cr⁴⁺:YAG lasers with degenerate resonators

Pi-Hui Tuan, Yen-Hui Hsieh, Hsin-Chih Liang, Kuan-Wei Su, Yung-Fu Chen

Author Affiliations +

Proceedings Volume 10712, Optical Manipulation Conference; 107120S (2018) https://doi.org/10.1117/12.2319158
Event: SPIE Structured Light, 2018, Yokohama, Japan

Abstract

Off-axis pumped Nd:YAG/Cr⁴⁺:YAG lasers under degenerate cavity conditions are explored to achieve high-pulseenergy geometric modes for beam transformation. The employment of Nd:YAG crystal promises efficient passively Qswitched (PQS) operation with a flexible cavity length to ensure various PQS geometric modes with stable structures can be generated. It is experimentally confirmed that the output energy and peak power of the PQS geometric modes can easily reach up to over 100 μJ and 10 kW with fairly stable pulse trains in pure linear polarization. Various high-energy vortex beams carrying large angular momentum and diverse phase structures are achieved by converting the planar geometric modes into the circular ones to offer promising light sources for potential applications.

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Pi-Hui Tuan, Yen-Hui Hsieh, Hsin-Chih Liang, Kuan-Wei Su, and Yung-Fu Chen "Generation of high-energy geometric structured beams by off-axis pumped Nd:YAG/Cr⁴⁺:YAG lasers with degenerate resonators", Proc. SPIE 10712, Optical Manipulation Conference, 107120S (24 April 2018); https://doi.org/10.1117/12.2319158

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