Near-infrared/mid-infrared laser irradiation effects on polyethylene film

Minsun Chen; Hao Liu; Kai Han; Guomin Zhao; Wenda Cui; Changqing Song; Chuan Guo

doi:10.1117/12.2656321

22 December 2022 Near-infrared/mid-infrared laser irradiation effects on polyethylene film

Minsun Chen, Hao Liu, Kai Han, Guomin Zhao, Wenda Cui, Changqing Song, Chuan Guo

Proceedings Volume 12459, Sixth International Symposium on Laser Interaction with Matter; 124591A (2022) https://doi.org/10.1117/12.2656321
Event: Sixth International Symposium on Laser Interaction with Matter (LIMIS 2022), 2022, Ningbo, China

Abstract

Experimental researches of the near-infrared laser with 1085nm wavelength and the mid-infrared laser with 3.8 microns wavelength irradiate on the transparent polyethylene film with a thickness of about 25 microns are carried out. Results show that the burn through time approximate exponentially decreases from 5.76s to 0.85s, for the average power density of the mid-infrared laser increases from 2.9W/cm2 to 37.2W/cm², and the damage energy density is about 22.2J/cm². The polyethylene film can be burned through by near-infrared laser irradiation with an average power density of 338.8W/cm2 for 18.6s, and the corresponding damage energy density is up to 6301.7J/cm². The failure time exponentially decreases from 18.6s to 0.75s with the incident laser density increases from 338.8W/cm2 to 428.5W/cm², and the corresponding damage energy density approximate exponentially decreases from 6301.7J/cm² to 321.4J/cm². The damage of near-infrared laser has obvious threshold effect. The polyethylene film would not be burned through until the laser power density reaches a certain high value, so the damage threshold of polyethylene film by near-infrared laser is 1 ~ 2 orders of magnitude higher than that by mid-wavelength infrared laser. The results are in good agreement with the absorption ratio of polyethylene film at wavelength of 3800 nm and 1085 nm measured under weak light.

Citation Download Citation

Minsun Chen, Hao Liu, Kai Han, Guomin Zhao, Wenda Cui, Changqing Song, and Chuan Guo "Near-infrared/mid-infrared laser irradiation effects on polyethylene film", Proc. SPIE 12459, Sixth International Symposium on Laser Interaction with Matter, 124591A (22 December 2022); https://doi.org/10.1117/12.2656321

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