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Powerful ultrashort pulses are generated using a hybrid MOPA consisting of a passively mode-locked semiconductor laser and a Yb-doped fiber amplifier. Pulses 2 ps in duration are amplified to an average power of 0.8 W.
A cladding-pumped, high-power amplifier was built incorporating a star-shaped, Ybdoped filter fiber. Pulsed amplifier measurements demonstrate strong suppression of stimulated Raman scattering accomplished by a special index profile with an up-doped ring.
Power scalable approach for THz generation is demonstrated using optical rectification in GaP pumped by a high power ultrafast Yb-doped fiber amplifier. 1.8 muW THz radiation is obtained from 2.6 W pump power.
We describe a 1080-nm diode master oscillator utilizing a fiber Fabry-Perot tunable filter with subsequent fiber amplification to 9 W output power. 25 MHz linewidth and 5 THz tuning in less than 1 ms were achieved.
4.6 ps pulses at 910 MHz produced by a passively mode-locked VECSEL were amplified by ytterbium doped fiber amplifiers to average powers greater than 200 W and subsequently compressed to 430 fs duration.
Spectral shaping in a fiber amplifier with finite gain bandwidth (DeltalambdaFWHM~15nm) and strong self-phase-modulation (PhiNL~12pi) is studied numerically and experimentally. Pulses amplified to 30 muJ energy are dechirped to 250 fs duration.
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