Journal
OPTICS LETTERS
Volume 34, Issue 9, Pages 1432-1434Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.34.001432
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We demonstrate an ultralong cavity, all-fiber, all-normal-dispersion Yb-doped fiber laser that is passively mode locked by a semiconductor saturable absorber mirror (SESAM). Without any discrete dispersion-compensation components or conventional spectral filters, the SESAM works together with the strongly chirped pulse and the nonlinearity induced spectrum broadening to perform a filtering-equivalent function, thus stabilizing the mode locking. The laser generates 4.3 nJ stable mode-locked pulses with a 397 kHz fundamental repetition rate at a 1068 nm central wavelength. (C) 2009 Optical Society of America
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