G. Lenz et al., FEMTOSECOND FIBER LASER-PULSES AMPLIFIED BY A KCL-TL-CENTER AMPLIFIERFOR CONTINUUM GENERATION IN THE 1.5-MU-M REGION( COLOR), Optics letters, 21(2), 1996, pp. 137-139
A diode-pumped stretched-pulse additive-pulse mode-locked Er-doped fib
er laser is used to seed a KCl:Tl+ color-center amplifier crystal. The
initial 1-nJ chirped pulses are double passed through the amplifier,
which is pumped by a 1-kHz Q-switched Nd:YAG laser. The resulting 10-m
u J pulses are then chirp compensated to 250-fs duration and are used
to generate a spectral continuum. A few high-nz materials are investig
ated for continuum generation, and spectral slicing of the continuum i
s demonstrated. (C) 1996 Optical Society of America