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Proceedings Paper

Intracavity frequency doubling of mu s alexandrite laser pulses
Author(s): Ralf Brinkmann; K. Schoof
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Paper 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.

Paper Details

Date Published: 1 June 1994
PDF: 9 pages
Proc. SPIE 2115, Visible and UV Lasers, (1 June 1994); doi: 10.1117/12.172749
Show Author Affiliations
Ralf Brinkmann, Medizinisches Laserzentrum Luebeck GmbH (Germany)
K. Schoof, Medizinisches Laserzentrum Luebeck GmbH (Germany)

Published in SPIE Proceedings Vol. 2115:
Visible and UV Lasers
Richard Scheps, Editor(s)

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