An actively mode-locked fiber laser is demonstrated, for the first time to our knowledge, by modulation of a saturable-absorber mirror with the light used simultaneously for pumping the gain fiber. Stabilization of a harmonically passive mode-locked fiber laser that generates soliton pulses of 550-fs duration is obtained with this technique. The results indicate a reduction of supermode suppression by more than 55 dB. The timing jitter is improved by 9 dB.
© 2003 Optical Society of America
(230.4110) Optical devices : Modulators
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(320.7080) Ultrafast optics : Ultrafast devices
(320.7090) Ultrafast optics : Ultrafast lasers
M. Guina and O. G. Okhotnikov, "Harmonic mode locking by synchronous optical pumping of a saturable absorber with the residual pump," Opt. Lett. 28, 358-360 (2003)