Intracavity frequency doubling of mu s alexandrite laser pulses

Ralf Brinkmann; K. Schoof

doi:10.1117/12.172749

1 June 1994 Intracavity frequency doubling of μs alexandrite laser pulses

Ralf Brinkmann, K. Schoof

Proceedings Volume 2115, Visible and UV Lasers; (1994) https://doi.org/10.1117/12.172749
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Intracavity second harmonic generation with a three mirror folded cavity configuration was investigated with a flashlamp pumped, Q-switched Alexandrite laser. We therefore used different nonlinear optical crystals to convert the fundamental 750 nm radiation into the near UV spectral range (375 nm). The laser pulses were stretched into the microsecond(s) time domain by an electronic feedback system regulating the losses of the resonator. We investigated the conversion efficiency for different pulse lengths as well as the effect of pulse-lengthening due to the nonlinearity of the intracavity losses introduced by the optical crystal used. Working with BBO-crystals, we were able to achieve a second harmonic output of 25 mJ per pulse at 375 nm with a temporal rectangular pulse of 1 microsecond(s) in length and a stable nearly Gaussian shaped beam profile.

Citation Download Citation

Ralf Brinkmann and K. Schoof "Intracavity frequency doubling of μs alexandrite laser pulses", Proc. SPIE 2115, Visible and UV Lasers, (1 June 1994); https://doi.org/10.1117/12.172749

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