Amplification of Femtosecond Pulses in Ti:Al2O3 Using an Injection-Seeded Laser.

摘要

Titanium-doped sapphire (Ti:Al2O3) is an attractive solid-state laser material with excellent potential for amplifying femtosecond pulses in the 700-1000-nm wavelength region. In this Letter we report studies of the amplification and pulse broadening of femtosecond pulses in Ti:Al2O3 by single-pulse seeding of a gain-switched Ti:Al2O3 laser. A 440-fsec, 0.1-pJ pulse from a dye laser is injected into a high-repetition-rate Ti:Al2O3 laser pumped by a copper-vapor laser to study the amplification and pulse broadening of femtosecond pulses in Ti:Al2O3. Gains of 2 x 10 to the 7th power are achieved with output pulse durations of 1.1 psec. After recompression with a grating pair to compensate dispersion broadening, pulses, as short as 275 fsec are obtained. Reprints. (AW)