Abstract
A stable passively synchronized femtosecond laser has been realized by coupling two 1.3 W mode-locked lasers with a Kerr medium. An ultralong tolerance of for the cavity length mismatch and a timing jitter of less than 0.4 fs were obtained. The relative carrier-envelope phase slip was directly observed by measuring the heterodyne output between the two lasers.
© 2005 Optical Society of America
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