Abstract
Summary form only given. Sumamry form only given. We use laser design methodology provides the highest energy from a regenerative amplifier possible with a modern pump laser (Quantronix 527 DQ) and minimizes the spectral and phase distortion for a regeneratively amplified ultrafast pulse. In most high-power laser systems, the regenerative amplifier is only a preamplifier that is followed by a multipass amplifier to increase the pulse energy to the several millijoule level. Our regenerative amplifier, however, produces 6 watts of average power at 2 kHz or 5 mJ of pulse energy at 1 kHz. We are aware of no previous Ti:sapphire regenerative amplifier whose average power exceeds 1.5 watts. The regenerative amplifier is a symmetric, two-rod, ring cavity that is stable with pump powers from 0 watts (single shot) to >28 watts.
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