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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 4 — Feb. 1, 2009
  • pp: 691–694

Flat-top and ultranarrow bandpass filter designed by sampled fiber Bragg grating with multiple equivalent phase shifts

Xihua Zou, Fei Wang, and Wei Pan  »View Author Affiliations


Applied Optics, Vol. 48, Issue 4, pp. 691-694 (2009)
http://dx.doi.org/10.1364/AO.48.000691


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Abstract

We propose a novel approach to designing an optical filter with a flat-top and ultranarrow transmission band by using a sampled fiber Bragg grating (SFBG) having multiple equivalent phase shifts (EPSs). In the proposed approach, multiple EPSs are fabricated by adjusting several sampling periods of the SFBG. The obtained multiple EPSs are then arranged properly to get a flat-top transmission band in the narrow 1 st reflection band of the SFBG, leading to the generation of a flat and ultranarrow transmission band. Filters with two or five EPSs are designed by simulation and experiment, with low ripples and ultranarrow 1 dB bandwidths observed in transmission bands.

© 2009 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(050.5080) Diffraction and gratings : Phase shift
(060.2340) Fiber optics and optical communications : Fiber optics components
(120.2440) Instrumentation, measurement, and metrology : Filters

ToC Category:
Diffraction and Gratings

History
Original Manuscript: October 1, 2008
Revised Manuscript: December 12, 2008
Manuscript Accepted: December 19, 2008
Published: January 21, 2009

Citation
Xihua Zou, Fei Wang, and Wei Pan, "Flat-top and ultranarrow bandpass filter designed by sampled fiber Bragg grating with multiple equivalent phase shifts," Appl. Opt. 48, 691-694 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-4-691

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