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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 3 — Feb. 7, 2005
  • pp: 1008–1014

1.2-ps mode-locked semiconductor optical amplifier fiber laser pulses generated by 60-ps backward dark-optical comb injection and soliton compression

Gong-Ru Lin, I-Hsiang Chiu, and Ming-Chung Wu  »View Author Affiliations

Optics Express, Vol. 13, Issue 3, pp. 1008-1014 (2005)

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Optically harmonic mode-locking of a semiconductor optical amplifier fiber laser (SOAFL) induced by backward injecting a dark-optical comb is demonstrated for the first time. The dark-optical comb with 60-ps pulsewidth is generated from a Mach-Zehnder modulator, which is driven by an electrical comb at a DC offset of 0.3Vπ. Theoretical simulation indicates that the backward injection of dark-optical comb results in a narrow gain window of 60 ps within one modulating period, providing a cross-gain-modulation induced mode-locking in the SOAFL with a shortest pulsewidth of 15 ps at repetition frequency of 1 GHz. The mode-locked SOAFL pulsewidth can be slightly shortened to 10.8 ps with a 200m-long dispersion compensating fiber. After nonlinearly soliton compression in a 5km-long single mode fiber, the pulsewidth, linewidth and time-bandwidth product become 1.2 ps, 2.06 nm and 0.31, respectively.

© 2005 Optical Society of America

OCIS Codes
(140.4050) Lasers and laser optics : Mode-locked lasers
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(320.5520) Ultrafast optics : Pulse compression

ToC Category:
Research Papers

Original Manuscript: January 5, 2005
Revised Manuscript: January 30, 2005
Published: February 7, 2005

Gong-Ru Lin, I-Hsiang Chiu, and Ming-Chung Wu, "1.2-ps mode-locked semiconductor optical amplifier fiber laser pulses generated by 60-ps backward dark-optical comb injection and soliton compression," Opt. Express 13, 1008-1014 (2005)

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