Dispersion-tuned harmonically mode-locked fiber ring laser for self-synchronization to an external clock
- 15 December 1996
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 21 (24) , 1984-1986
- https://doi.org/10.1364/ol.21.001984
Abstract
The stable operation of a high-repetition-rate dispersion-tuned harmonically mode-locked erbium-doped fiber ring laser is reported for the first time to our knowledge. The dispersion causes a round-trip delay that varies with wavelength, so synchronism with the amplitude modulator is passively maintained at a wavelength that is synchronous with the modulation frequency (external clock). One can tune the laser by simply changing the cavity length. A 10-GHz train of transform-limited, 6.5-ps duration pulses is obtained over an 8-nm tuning range. Pulse energy equalization can be achieved by the interplay of normal dispersion, self-phase modulation, and amplitude modulation.Keywords
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