Substrate influence on laser induced damage threshold  for laser mirrors at 10.6 micron

Zahra Nasiri; Hamidreza Fallah; Morteza Hajimahmoodzadeh; Mehdi Mardiha

doi:10.1117/12.2579438

20 August 2020 Substrate influence on laser induced damage threshold for laser mirrors at 10.6 micron

Zahra Nasiri, Hamidreza Fallah, Morteza Hajimahmoodzadeh, Mehdi Mardiha

Proceedings Volume 11460, Metamaterials, Metadevices, and Metasystems 2020; 1146031 (2020) https://doi.org/10.1117/12.2579438
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Conference Poster

Abstract

High damage threshold mirrors are necessary in high power laser systems. Different factors influence the rate of laser damage of these types of mirrors. In this research, the first thing that we tried was to simulate mirrors that are suitable for the reflectance spectra and are also in possession of high theoretically laser damage threshold at 10600 nm. After the task of simulation, the fabrication and coating process was performed by physical evaporation and in order to check the reflectance of the samples, their reflectance spectra were taken by uv-visible spectroscopy and their reflectance at 10600 nm is more than 99.5%. Finally, by measuring the thresholds of laser damage of mirrors made with continuous CO₂ lasers, we came to the conclusion that the all-dielectric mirror with ZnS substrate has the highest laser induced damage threshold.

Citation Download Citation

Zahra Nasiri, Hamidreza Fallah, Morteza Hajimahmoodzadeh, and Mehdi Mardiha "Substrate influence on laser induced damage threshold for laser mirrors at 10.6 micron", Proc. SPIE 11460, Metamaterials, Metadevices, and Metasystems 2020, 1146031 (20 August 2020); https://doi.org/10.1117/12.2579438

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