We show that powerful femtosecond pulses can be obtained by use of a series of amplifying media with shifted but overlapping narrow gain bandwidth. This concept, based on chirped-pulse amplification in Nd:glass amplifiers, permits the generation of sub-100-TW pulses with durations shorter than 300 fs. Experimental gain narrowing and phase distortion are found to be in good agreement with theory.
© 1995 Optical Society of America
N. Blanchot, C. Rouyer, C. Sauteret, and A. Migus, "Amplification of sub—100—TW femtosecond pulses by shifted amplifying Nd:glass amplifiers: theory and experiments," Opt. Lett. 20, 395-397 (1995)