Abstract
We have developed a simple model for ultrabroadband and ultrashort pulse amplification. We provide detailed calculations of the effects that govern chirped-pulse amplification including regenerative pulse shaping, gain narrowing and gain saturation in Ti:sapphire laser amplifiers. Thin solid etalons are used to control both gain narrowing and gain saturation during amplification. This model has been used to design an optimized Ti: sapphire amplifier system for efficiently producing pulses of sub-20-fs duration as the peak power of 100 TW is approached.
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