We demonstrate a mode-locked, erbium-doped fiber laser with its repetition frequency synchronized to a second fiber laser via an intracavity electro-optic modulator (EOM). With servo control from the EOM (bandwidth ∼230 kHz) and a slower speed intracavity piezoelectric transducer (resonance at ∼20 kHz), we demonstrate stabilization of the repetition frequency with an in-loop rms timing jitter of 10 fs, integrated over a bandwidth from 1 Hz to 100 kHz. This represents what is to our knowledge the first time an EOM has been introduced inside a mode-locked laser cavity for fast servo action and the lowest timing jitter reported for a mode-locked fiber laser.
© 2005 Optical Society of America
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(140.3510) Lasers and laser optics : Lasers, fiber
(320.7090) Ultrafast optics : Ultrafast lasers
Darren D. Hudson, Kevin W. Holman, R. Jason Jones, Steven T. Cundiff, Jun Ye, and David J. Jones, "Mode-locked fiber laser frequency-controlled with an intracavity electro-optic modulator," Opt. Lett. 30, 2948-2950 (2005)