, Volume 70, Issue 1 Supplement, pp S193-S196

Control of thermal effects for high-intensity Ti:sapphire laser chains

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We have experimentally studied thermal effects in highly pumped Ti:sapphire crystals in the 140–340 K temperature range. We demonstrate that a critical temperature exists, which depends on pumping and probing conditions, below which detrimental thermal effects completely disappear. In particular, we show that in a typical high-intensity Ti:sapphire amplifier, thermal lensing and wave-front distortions can be suppressed keeping the crystal temperature lower than ∼230 K.

Received: 1 October 1999 / Revised version: 20 March 2000 / Published online: 24 May 2000