Incorporation of a cavity-dumped oscillator in a long-wavelength injected femtosecond terawatt Ti : sapphire laser

Abstract

A cavity-dumped Ti:sapphire laser was utilized as a front-end oscillator in a femtosecond terawatt Ti:sapphire laser. The increase of the oscillator energy by 30 times helped to reduce the gain narrowing and to suppress the amplified spontaneous emission in a preamplifier. In combination with the long-wavelength injection method (J. Opt. Sec. Am. B 16 (1999) 1220), an amplified spectrum broad enough to support sub-20 fs could be generated at a multiterawatt level, and 20-fs, 3-TW pulses were demonstrated. (C) 2000 Published by Elsevier Science B.V.