Intracavity frequency doubling of {mu}s alexandrite laser pulses
Book
·
OSTI ID:51820
- Medizinisches Laserzentrum Luebeck GmbH (Germany)
Intracavity second harmonic generation (SHG) with a three mirror folded cavity configuration was investigated with a flashlamp pumped, Q-switched Alexandrite laser. The authors therefore used different nonlinear optical crystals to convert the fundamental 750 nm radiation into the near UV spectral ,range (3 75 nm). The laser pulses were stretched into the {mu}s time domain by an electronic feedback system regulating the losses of the resonator. They 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, they were able to achieve a second harmonic output of 25 mJ per pulse at 375 mn with a temporal rectangular pulse of 1 {mu}s in length and a stable nearly gaussian shaped beam profile.
- OSTI ID:
- 51820
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1408-5
- Country of Publication:
- United States
- Language:
- English
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