We demonstrate the generation of high-power near-Fourier-transform-limited pulses with variable pulse duration in the nanosecond regime through a combination of fiber and bulk amplification. The fiber amplifier consists of a dual-stage fiber amplifier based on Nd- and Yb-doped single- and double-clad fibers. The bulk amplifier consists of a four-pass, flash-lamp-pumped Nd:YAG rod. Since no resonance condition is required for locking of the seed source to a slave cavity, the setup is extremely rugged.
© 2001 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3520) Lasers and laser optics : Lasers, injection-locked
(140.3530) Lasers and laser optics : Lasers, neodymium
Remus Nicolaescu, Edward S. Fry, and Thomas Walther, "Generation of near-Fourier-transform-limited high-energy pulses in a chain of fiber—bulk amplifiers," Opt. Lett. 26, 13-15 (2001)