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Optics Letters

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  • Vol. 36, Iss. 9 — May. 1, 2011
  • pp: 1590–1592

Harmonic mode locking in a sliding-frequency fiber laser

Carlo Amadeo Alonzo and Seok H. Yun  »View Author Affiliations


Optics Letters, Vol. 36, Issue 9, pp. 1590-1592 (2011)
http://dx.doi.org/10.1364/OL.36.001590


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Abstract

We demonstrate a sliding-frequency mode-locked (SFM) erbium fiber laser generating 20 ps pulses with center wavelengths rapidly sweeping across a spectral range of 50 nm . Excess optical nonlinearity in the laser cavity leads to multipulsing, with a tendency to tight pulse bunching ( < 3 ns ) at the fundamental cavity frequency of 25 MHz . The addition of a parallel optical delay line, with a path difference equal to a rational fraction of the cavity length, distributes the pulses uniformly across the entire cavity and achieves a harmonic SFM up to 1 GHz . The result establishes cavity nonlinearity as a critical design parameter for picosecond wavelength-swept lasers.

© 2011 Optical Society of America

OCIS Codes
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3600) Lasers and laser optics : Lasers, tunable
(140.4050) Lasers and laser optics : Mode-locked lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 19, 2011
Revised Manuscript: March 14, 2011
Manuscript Accepted: March 14, 2011
Published: April 22, 2011

Citation
Carlo Amadeo Alonzo and Seok H. Yun, "Harmonic mode locking in a sliding-frequency fiber laser," Opt. Lett. 36, 1590-1592 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-9-1590


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