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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 16 — Aug. 15, 2008
  • pp: 1920–1922

Frequency-modulated, tunable, semiconductor-optical-amplifier-based fiber ring laser for linewidth and line shape control

Simon Lambert Girard, Hongxin Chen, Gregory W. Schinn, and Michel Piché  »View Author Affiliations

Optics Letters, Vol. 33, Issue 16, pp. 1920-1922 (2008)

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We report how the linewidth and line shape of a tunable semiconductor-optical-amplifier-based fiber ring laser can be actively adjusted by applying an intracavity frequency modulation to the laser. Frequency-modulated laser operation is achieved by driving the phase modulator frequency close to the cavity axial-mode spacing, leading to a constant-amplitude laser output having a periodically varying instantaneous frequency. The resulting linewidth varies proportionally with the inverse of the frequency detuning, and it is adjustable from submegahertz to over more than 5 GHz . By appropriate selection of the modulating waveform we have synthesized a near-Gaussian output line shape; other line shapes can be produced by modifying the modulating waveform. Experimental observations are in good agreement with a simple model.

© 2008 Optical Society of America

OCIS Codes
(140.3430) Lasers and laser optics : Laser theory
(140.3510) Lasers and laser optics : Lasers, fiber
(250.5980) Optoelectronics : Semiconductor optical amplifiers

ToC Category:
Lasers and Laser Optics

Original Manuscript: May 1, 2008
Manuscript Accepted: June 19, 2008
Published: August 14, 2008

Simon Lambert Girard, Hongxin Chen, Gregory W. Schinn, and Michel Piché, "Frequency-modulated, tunable, semiconductor-optical-amplifier-based fiber ring laser for linewidth and line shape control," Opt. Lett. 33, 1920-1922 (2008)

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