Endurance performance of transmissive liquid crystal phase and polarization controllers for kW-class high-power lasers

K. Yoshiki; T. Yamamoto

doi:10.1117/12.2649437

14 March 2023 Endurance performance of transmissive liquid crystal phase and polarization controllers for kW-class high-power lasers

K. Yoshiki, T. Yamamoto

Author Affiliations +

Proceedings Volume 12442, Emerging Liquid Crystal Technologies XVIII; 1244208 (2023) https://doi.org/10.1117/12.2649437
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

This study developed a Liquid Crystal (LC) device that incorporated lasers for machining with output power of the order of kW. The use of sapphire as a substrate along with an appropriate cooling system facilitated the LCs in enabling the control of the phase and polarization of high-power laser light, which is not possible in case of conventional LCs. The exposure of LCs to high-power laser light results in heat accumulation, which causes the destruction of the LC cells. As photochemical damage has a lower occurrence probability at longer wavelengths, the promotion of heat radiation is an important strategy for the application of LCs to near infrared laser beams. The phase control of laser beams up to 6 kW was achieved using the proposed LC substrate as a cooling plate and optimizing the cooling system. Moreover, we compensated for the variation in the properties of the LC with temperature via adjustments to the drive voltage of the LC.

Conference Presentation

Citation Download Citation

K. Yoshiki and T. Yamamoto "Endurance performance of transmissive liquid crystal phase and polarization controllers for kW-class high-power lasers", Proc. SPIE 12442, Emerging Liquid Crystal Technologies XVIII, 1244208 (14 March 2023); https://doi.org/10.1117/12.2649437

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