Fundamental Mode Operation Of A Pulsed Nd:YAG Laser With A Variable Reflectivity Mirror

Alain Chandonnet; Kevin J. Snell; Michel Piche; Nathalie McCarthy; Pierre Lavigne

doi:10.1117/12.950079

24 March 1989 Fundamental Mode Operation Of A Pulsed Nd:YAG Laser With A Variable Reflectivity Mirror

Alain Chandonnet, Kevin J. Snell, Michel Piche, Nathalie McCarthy, Pierre Lavigne

Proceedings Volume 1021, High Power Solid State Lasers; (1989) https://doi.org/10.1117/12.950079
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

Optical beams of fundamental mode shape were obtained from a pulsed Nd:YAG laser using an output mirror with a parabolic reflectivity profile in an unstable Cassegrain resonator. When the laser is operated in the free-running regime, the near field is smooth and the far field has no significant secondary lobe. In the passive mode-locking regime, the beam quality is maintained; however, the beam waist is reduced compared to the free-running regime. This observation is attributed to the ability of a nonlinear element such as a saturable absorber to reshape a laser beam. Emission of pulse trains with a 96% reproducibility has been obtained with such a resonator.

Citation Download Citation

Alain Chandonnet, Kevin J. Snell, Michel Piche, Nathalie McCarthy, and Pierre Lavigne "Fundamental Mode Operation Of A Pulsed Nd:YAG Laser With A Variable Reflectivity Mirror", Proc. SPIE 1021, High Power Solid State Lasers, (24 March 1989); https://doi.org/10.1117/12.950079

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