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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 6 — Mar. 17, 2008
  • pp: 3871–3876

Second-order all-fiber comb filter based on polarization-diversity loop configuration

Yong Wook Lee, Hyun-Tak Kim, and Yong Wan Lee  »View Author Affiliations

Optics Express, Vol. 16, Issue 6, pp. 3871-3876 (2008)

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By concatenating three birefringence loops in series, a second-order all-fiber comb filter based on a polarization-diversity loop configuration is newly proposed. The proposed filter consists of one polarization beam splitter, polarization-maintaining fibers, and two half-wave plates. The effect of a second-order structure of polarization-maintaining fiber loops on a bandwidth of the filter passband was theoretically analyzed and experimentally demonstrated. Transmission output of the second-order filter (flat-top and narrow-band transmission spectra) could be obtained by adjusting two half-wave plates. 1 and 3 dB bandwidths of the proposed filter in flat-top and narrow-band operations were greater by ~102.9 and 44.3 % and smaller by ~47.9 and 47.1 % than those of a conventional Sagnac birefringence filter, respectively.

© 2008 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2420) Fiber optics and optical communications : Fibers, polarization-maintaining
(350.2460) Other areas of optics : Filters, interference

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 28, 2007
Revised Manuscript: December 25, 2007
Manuscript Accepted: December 26, 2007
Published: March 10, 2008

Yong W. Lee, Hyun-Tak Kim, and Yong W. Lee, "Second-order all-fiber comb filter based on polarization-diversity loop configuration," Opt. Express 16, 3871-3876 (2008)

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