Second, third, and fourth harmonic generation of amplified femtosecond Ti:sapphire laser pulses

Vitaly N. Krylov; Alexander G. Kalintsev; Aleksander Rebane; Daniel Erni; Urs Paul Wild

doi:10.1117/12.239716

8 May 1996 Second, third, and fourth harmonic generation of amplified femtosecond Ti:sapphire laser pulses

Vitaly N. Krylov, Alexander G. Kalintsev, Aleksander Rebane, Daniel Erni, Urs Paul Wild

Proceedings Volume 2701, Generation, Amplification, and Measurement of Ultrashort Laser Pulses III; (1996) https://doi.org/10.1117/12.239716
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

We studied both experimentally and theoretically, the conversion efficiency of 150-fs-duration Ti:sapphire laser pulses to the second, third and fourth harmonic. The laser pulses at the wavelength of 780 nm have a spectral width of 10 nm and were amplified to 0.8 mJ energy in a regenerative amplifier. With a repetition rate of 1 kHz intensity of up to 150 GW/cm² could be reached by focusing the beam with a lens. KDP, BBO and LilO₃ crystals of different length were used for the conversion process. The experimentally observed conversion efficiency to the second, third and fourth harmonic does not exceed 50%, 15% and 8%, correspondingly. It is shown theoretically that one possible process limiting the conversion efficiency of the femtosecond pulses at low as well as high intensity is the modulation of the phase of the fundamental wave.

Citation Download Citation

Vitaly N. Krylov, Alexander G. Kalintsev, Aleksander Rebane, Daniel Erni, and Urs Paul Wild "Second, third, and fourth harmonic generation of amplified femtosecond Ti:sapphire laser pulses", Proc. SPIE 2701, Generation, Amplification, and Measurement of Ultrashort Laser Pulses III, (8 May 1996); https://doi.org/10.1117/12.239716

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