Analysis of the load capacity of optically addressed spatial light modulators based on different laser irradiation spot sizes

Zhilan Han; Wei Fan; He Cheng; Dajie Huang; Lin Chen

doi:10.1117/12.3015452

22 December 2023 Analysis of the load capacity of optically addressed spatial light modulators based on different laser irradiation spot sizes

Zhilan Han, Wei Fan, He Cheng, Dajie Huang, Lin Chen

Author Affiliations +

Proceedings Volume 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023); 129740M (2023) https://doi.org/10.1117/12.3015452
Event: Fifth International Symposium on High Power Laser Science and Engineering, 2023, Suzhou, China

Abstract

Due to the thermal deposition, the switching ratio of the amplitude OASLM will be reduced, so it is difficult to play a better effect in the high average power laser system. In this paper, through the analysis of laser-induced temperature rise model and liquid crystal layer voltage model and experiments, we show that with the same aperture and same switching ratio, the tolerable optical power density will decrease with the larger irradiation spot area. When the spot diameter decreases from 8 mm to 3 mm without heat dissipation treatment, the temperature of the OASLM emitting surface decreases from 39.6 °C to 33 °C, and the laser tolerated power density improves from 32.8 W/ cm² to 120 W/ cm², but the total tolerated power decreases from 16.5 W to 8.5 W. Therefore, in order to improve the total power tolerance of the optical addressable spatial light modulator, it is still an important technical way to improve the clear aperture of the optical addressable spatial light modulator.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Zhilan Han, Wei Fan, He Cheng, Dajie Huang, and Lin Chen "Analysis of the load capacity of optically addressed spatial light modulators based on different laser irradiation spot sizes", Proc. SPIE 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023), 129740M (22 December 2023); https://doi.org/10.1117/12.3015452

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KEYWORDS

Liquid crystals

Optically addressed spatial light modulators

Laser irradiation

Beam diameter

Switching

Temperature distribution

Transmittance

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