Active control of focus position of laser beams using thermally induced lensing

Lebohang T. Bell; Chemist M. Mabena; Darryl Naidoo

doi:10.1117/12.2650353

15 March 2023 Active control of focus position of laser beams using thermally induced lensing

Lebohang T. Bell, Chemist M. Mabena, Darryl Naidoo

Proceedings Volume 12407, Laser Resonators, Microresonators, and Beam Control XXV; 124070F (2023) https://doi.org/10.1117/12.2650353
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

In this paper, we present a method for active control of thermally induced lensing in high-power lasers. We used thermal lensing to study the advantages of high-power lasers. Many delivery optics are sensitive to the thermally induced lens, which can change the focus position of the transmitted beam. To compensate for this, we used thermal lensing by pumping a crystal that had no absorption or amplification at the seed beam wavelength. By controlling the strength of the heat source, we demonstrate acute control of the focus position. Our modeling work is based on the finite-volume method (FVM) to analyse thermal effects in end-pumped solid-state crystals. This work has the potential to pave the way for active control of a thermally induced lens in high-powered laser-based applications.

Citation Download Citation

Lebohang T. Bell, Chemist M. Mabena, and Darryl Naidoo "Active control of focus position of laser beams using thermally induced lensing", Proc. SPIE 12407, Laser Resonators, Microresonators, and Beam Control XXV, 124070F (15 March 2023); https://doi.org/10.1117/12.2650353

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