Mode locking of an all-fiber laser by acousto-optic superlattice modulation

Active mode locking of an erbium-doped all-fiber laser with a Bragg-grating-based acousto-optic modulator is demonstrated. The fiber Bragg grating was acoustically modulated by a standing longitudinal elastic wave, which periodically modulates the sidebands at twice the acoustic frequency. The laser...

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Bibliographic Details
Published in:Optics letters 2009-04, Vol.34 (7), p.1111-1113
Main Authors: CUADRADO-LABORDE, C, DIEZ, A, DELGADO-PINAR, M, CRUZ, J. L, ANDRES, M. V
Format: Article
Language:English
Subjects:
Beam characteristics: profile, intensity, and power
spatial pattern formation
Exact sciences and technology
Fiber lasers
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Lasers
Modulation, tuning, and mode locking
Optics
Physics
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Summary:Active mode locking of an erbium-doped all-fiber laser with a Bragg-grating-based acousto-optic modulator is demonstrated. The fiber Bragg grating was acoustically modulated by a standing longitudinal elastic wave, which periodically modulates the sidebands at twice the acoustic frequency. The laser has a Fabry-Perot configuration in which cavity loss modulation is achieved by tuning the output fiber Bragg grating to one of the acoustically induced sidebands. Optical pulses at 9 MHz repetition rate, 120 mW peak power, and 780 ps temporal width were obtained. The output results to be stable and has a timing jitter below 40 ps. The measured linewidth, 2.8 pm, demonstrates that these pulses are transform limited.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.34.001111