We demonstrate a regenerative amplif ier incorporating alexandrite as the gain medium that is pumped by an alexandrite laser. Temperature-altered gain permitted the 728-nm alexandrite pump laser, operating at room temperature, to pump a 780–800-nm alexandrite laser that was maintained at elevated temperatures. 200-fs pulses from a Ti:sapphire oscillator were amplif ied to the millijoule level. This system also amplif ied femtosecond pulses from a frequency-doubled Er-doped fiber laser.
© 1996 Optical Society of America
A. Hariharan, M. E. Fermann, M. L. Stock, D. J. Harter, and Jeff Squier, "Alexandrite-pumped alexandrite regenerative amplifier for femtosecond pulse amplification," Opt. Lett. 21, 128-130 (1996)