Mode coupling enhancement by astigmatism compensation in a femtosecond laser cavity

Gustavo Castro-Olvera; Jesus Garduño-Mejía; Martha Rosete-Aguilar; Carlos J. Roman-Moreno

doi:10.1117/12.2237896

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27 September 2016 Mode coupling enhancement by astigmatism compensation in a femtosecond laser cavity

Gustavo Castro-Olvera, Jesus Garduño-Mejía, Martha Rosete-Aguilar, Carlos J. Roman-Moreno

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Proceedings Volume 9950, Laser Beam Shaping XVII; 99500W (2016) https://doi.org/10.1117/12.2237896
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

In this work we present a numerical analysis of the mode coupling between the pump-beam and the laser-beam in a Ti:Sapphire crystal used as a gain medium of a femtosecond laser. Using the Matrix ABCD and propagation gaussian beam models, we obtained an optimal configuration for compensate the astigmatism in the output beam laser. Also we analysed pump-beam propagation and got the settings to fix the astigmatism in the crystal. Furthermore we apply this configuration to a homemade femtosecond laser, accomplishing an overall efficiency of laser to 20% in continuum wave (CW) and 16% in mode looking (ML) operation. The femtosecond laser have 30 nm bandwidth to FWHM at 810 nm corresponding 30fs.

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Gustavo Castro-Olvera, Jesus Garduño-Mejía, Martha Rosete-Aguilar, and Carlos J. Roman-Moreno "Mode coupling enhancement by astigmatism compensation in a femtosecond laser cavity", Proc. SPIE 9950, Laser Beam Shaping XVII, 99500W (27 September 2016); https://doi.org/10.1117/12.2237896

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