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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 5 — Mar. 1, 2010
  • pp: 769–771

Microwave photonic filter based on circulating a cladding mode in a fiber ring resonator

Zhu Wang, Kin Seng Chiang, and Qing Liu  »View Author Affiliations

Optics Letters, Vol. 35, Issue 5, pp. 769-771 (2010)

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We propose a microwave photonic filter based on circulating a cladding mode in a fiber ring resonator, where the cladding mode is injected into and extracted from the resonator with a pair of matching long-period fiber gratings (LPFGs). The filter has a compact configuration and allows the frequency spacing and the notch depth to be tuned easily. The use of LPFGs also provides the capability of wavelength selection and tuning. Using a standard single-mode fiber and a pair of C O 2 laser-written LPFGs, we demonstrate a filter with a frequency spacing of 1.3 GHz and a notch depth of 17 dB . Our experimental results agree well with theoretical calculations.

© 2010 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(230.5750) Optical devices : Resonators
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 11, 2009
Revised Manuscript: December 23, 2009
Manuscript Accepted: January 22, 2010
Published: February 26, 2010

Zhu Wang, Kin Seng Chiang, and Qing Liu, "Microwave photonic filter based on circulating a cladding mode in a fiber ring resonator," Opt. Lett. 35, 769-771 (2010)

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