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Optics Express

Optics Express

  • Vol. 17, Iss. 7 — Mar. 30, 2009
  • pp: 5414–5419

A wavelength-switchable single-longitudinal-mode dual-wavelength erbium-doped fiber laser for switchable microwave generation

Shilong Pan and Jianping Yao  »View Author Affiliations


Optics Express, Vol. 17, Issue 7, pp. 5414-5419 (2009)
http://dx.doi.org/10.1364/OE.17.005414


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Abstract

A novel wavelength-switchable single-longitudinal-mode (SLM) dual-wavelength erbium-doped fiber laser (EDFL) implemented based on a sigma architecture that is composed of a ring loop and a linear standing wave arm is experimentally demonstrated. Gain competition that prevents stable dual-wavelength oscillation is effectively suppressed by placing the gain medium in the standing-wave arm and by introducing polarization hole burning (PHB) via polarization multiplexing of the two lasing wavelengths in the ring loop. The SLM operation is guaranteed by an ultranarrow Fabry-Perot filter (FPF) introduced by absorption saturation in an unpumped erbium-doped fiber (EDF) and the gain saturation in the gain medium. In addition, the ring cavity forms a Lyot filter for each wavelength. Thus, wavelength switching is achieved by simply adjusting the polarization state of either wavelength. By beating the two SLM wavelengths at a photodetector (PD), a microwave signal with a frequency tunable from ~10 to ~50 GHz is experimentally generated.

© 2009 Optical Society of America

OCIS Codes
(140.3570) Lasers and laser optics : Lasers, single-mode
(350.4010) Other areas of optics : Microwaves
(060.2840) Fiber optics and optical communications : Heterodyne
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: February 9, 2009
Revised Manuscript: March 4, 2009
Manuscript Accepted: March 16, 2009
Published: March 20, 2009

Citation
Shilong Pan and Jianping Yao, "A wavelength-switchable single-longitudinal-mode dual-wavelength erbium-doped fiber laser for switchable microwave generation," Opt. Express 17, 5414-5419 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-7-5414


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