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Proceedings Paper

Dynamic compensation of thermal lensing and birefringence in a high-brightness Nd:Cr:GSGG oscillator
Author(s): Inon Moshe; Steven M. Jackel; Raphael Lallouz; I. Tzuk
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Paper Abstract

In this work, five fundamental concepts were combined to a low development of high efficiency, low divergence, narrow bandwidth, flashlamp pumped oscillators capable of operation over a broad operating range. These concepts were: flashlamp pumped Nd:Cr:GSGG to achieve high efficiency, a 'Reentrant Cavity' to eliminate birefringence losses, a variable radius back mirror in a hemispherical cavity to achieve maximum Gaussian beam fill factor, a very high damage threshold, spectrum narrowing output coupler fabricated using a stack of uncoated etalons to form a resonant reflector, a cylindrical zoom lens to completely eliminate astigmatism. The results were successful, and yielded an oscillator that produced 10 mJ, TEM00 300 MHz bandwidth, 75 ns pulses, over a repetition rate of 1-20 Hz, and at a slope efficiency of 2 percent. These techniques were also successfully applied to a YLF oscillator. They may, in part, be adapted for use to unstable resonators.

Paper Details

Date Published: 22 September 1997
PDF: 11 pages
Proc. SPIE 3110, 10th Meeting on Optical Engineering in Israel, (22 September 1997); doi: 10.1117/12.281333
Show Author Affiliations
Inon Moshe, Soreq Nuclear Research Ctr. (Israel)
Steven M. Jackel, Soreq Nuclear Research Ctr. (Israel)
Raphael Lallouz, Soreq Nuclear Research Ctr. (Israel)
I. Tzuk, Soreq Nuclear Research Ctr. (Israel)

Published in SPIE Proceedings Vol. 3110:
10th Meeting on Optical Engineering in Israel
Itzhak Shladov; Stanley R. Rotman, Editor(s)

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