Abstract
Passive cw mode locking of an ytterbium-doped fluoride phosphate glass laser is demonstrated, for what we believe to be the first time, based solely on the Kerr effect in the active medium in a resonator with dispersion compensation. Nearly bandwidth-limited pulses as short as 160 fs are generated at nm. We obtain average output powers as high as 250 mW at 170-MHz repetition rate with absorbed pump power as low as 1.2 W.
© 1997 Optical Society of America
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