Effects of reflective mirrors of CO2 laser with folded cavity on polarization of output laser beam and water flow rate for cooling reflective mirrors

Hanwei Yi; Fengdong Zhang; Ruiyan Sun; Hengsan Lai; Qingchao Meng

doi:10.1117/12.481755

5 September 2002 Effects of reflective mirrors of CO₂ laser with folded cavity on polarization of output laser beam and water flow rate for cooling reflective mirrors

Hanwei Yi, Fengdong Zhang, Ruiyan Sun, Hengsan Lai, Qingchao Meng

Author Affiliations +

Proceedings Volume 4914, High-Power Lasers and Applications II; (2002) https://doi.org/10.1117/12.481755
Event: Photonics Asia, 2002, Shanghai, China

Abstract

Polarization of CO2 laser light in folded cavity of CO2 laser has been studied in this paper. It is proved that actually laser light in CO2 laser with a folded cavity is polarized perpendicularly to plane which is determined by fold cavity axes, because of difference between reflectivity of mirrors for parallelly polarized laser light and reflectivity of mirrors for perpendicularly polarized laser light in the cavity. It is pointed out that linearly polarized laser beam has to be changed to circularly polarized laser beam to improve cutting quality by the CO2 laser. The heat power given off by reflective mirrors and minimum water flow rate for cooling mirrors have been proposed.

Citation Download Citation

Hanwei Yi, Fengdong Zhang, Ruiyan Sun, Hengsan Lai, and Qingchao Meng "Effects of reflective mirrors of CO₂ laser with folded cavity on polarization of output laser beam and water flow rate for cooling reflective mirrors", Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); https://doi.org/10.1117/12.481755

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