Alexandrite-pumped alexandrite regenerative amplifier for femtosecond pulse amplification.
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.
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A
Hariharan
M E
ME
Fermann
M L
ML
Stock
D J
DJ
Harter
J
J
Squier