Gain saturation effects and beam symmetrization in fast-transverse-flow industrial lasers with folded resonators

Nikolai A. Generalov; Valery S. Moskalev; Nikolai G. Solov'yov; Mikhail Yu. Yakimov; Vladimir P. Zimakov

doi:10.1117/12.499269

25 June 2003 Gain saturation effects and beam symmetrization in fast-transfverse-flow industrial lasers with folded resonators

Nikolai A. Generalov, Valery S. Moskalev, Nikolai G. Solov'yov, Mikhail Yu. Yakimov, Vladimir P. Zimakov

Author Affiliations +

Proceedings Volume 4969, Laser Resonators and Beam Control VI; (2003) https://doi.org/10.1117/12.499269
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States

Abstract

Different N-folded multiple-pass resonator schemes were realized and tested in high power fast-transverse-flow CO₂ lasers. In all cases beam ellipticity occur due to gain saturation followed by beam self-action in active medium with fast transverse gas flow. To avoid this effect new resonator structure was proposed where N-folded passes are arranged in different crossed planes declined to the gas flow direction. Fast-transverse-flow industrial CO₂ laser "Lantan" with this resonator scheme demonstrates high beam quality up to 2.5 kW CW output power with differential efficiency of 16%.

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Nikolai A. Generalov, Valery S. Moskalev, Nikolai G. Solov'yov, Mikhail Yu. Yakimov, and Vladimir P. Zimakov "Gain saturation effects and beam symmetrization in fast-transfverse-flow industrial lasers with folded resonators", Proc. SPIE 4969, Laser Resonators and Beam Control VI, (25 June 2003); https://doi.org/10.1117/12.499269

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KEYWORDS

Resonators

Mirrors

Laser resonators

Transmission electron microscopy

Near field

Gas lasers

Near field optics

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