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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 3 — Feb. 1, 2010
  • pp: 324–326

Tunable multimode-interference bandpass fiber filter

J. E. Antonio-Lopez, A. Castillo-Guzman, D. A. May-Arrioja, R. Selvas-Aguilar, and P. LiKamWa  »View Author Affiliations

Optics Letters, Vol. 35, Issue 3, pp. 324-326 (2010)

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We report on a wavelength-tunable filter based on multimode interference (MMI) effects. A typical MMI filter consists of a multimode fiber (MMF) spliced between two single-mode fibers (SMF). The peak wavelength response of the filter exhibits a linear dependence when the length of the MMF is modified. Therefore a capillary tube filled with refractive-index-matching liquid is used to effectively increase the length of the MMF, and thus wavelength tuning is achieved. Using this filter a ring-based tunable erbium-doped fiber laser is demonstrated with a tunability of 30 nm , covering the full C-band.

© 2010 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2410) Fiber optics and optical communications : Fibers, erbium
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3600) Lasers and laser optics : Lasers, tunable

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 2, 2009
Revised Manuscript: December 21, 2009
Manuscript Accepted: December 22, 2009
Published: January 25, 2010

J. E. Antonio-Lopez, A. Castillo-Guzman, D. A. May-Arrioja, R. Selvas-Aguilar, and P. LiKamWa, "Tunable multimode-interference bandpass fiber filter," Opt. Lett. 35, 324-326 (2010)

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