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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 29 — Oct. 10, 2009
  • pp: 5438–5444

Analysis for reflection peaks of multiple-phase-shift based sampled fiber Bragg gratings and application in high channel-count filter design

Kun Hua Wen, Lian Shan Yan, Wei Pan, Bin Luo, Xi Hua Zou, Jia Ye, and Ya Nan Ma  »View Author Affiliations


Applied Optics, Vol. 48, Issue 29, pp. 5438-5444 (2009)
http://dx.doi.org/10.1364/AO.48.005438


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Abstract

An analytical expression for calculating the reflection-peak wavelengths (RPWs) of a uniform sampled fiber Bragg grating (SFBG) with the multiple-phase-shift (MPS) technique is derived through Fourier transform of the index modulation. The new expression can accurately depict the RPWs incorporating various parameters such as the duty cycle and the DC index change. The effectiveness of the derived expression is further confirmed by comparing the RPWs estimated from the expression with the simulated reflective spectra using the piecewise uniform method. And the reflective spectrum has been well optimized by introducing the Gaussian apodization function to suppress the sidelobes without any wavelength shift on the RPWs. Then, a high-channel-count comb filter based on MPS is proposed by cascading two or more SFBGs with different Bragg periods but with the same RPWs. Noticeably, the RPWs of the new structured SFBG can also be accurately calculated through the expression. Furthermore, the number of spectral channels can be controlled by choosing gratings with specified difference Bragg periods.

© 2009 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2340) Fiber optics and optical communications : Fiber optics components
(230.1480) Optical devices : Bragg reflectors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 13, 2009
Revised Manuscript: August 18, 2009
Manuscript Accepted: September 6, 2009
Published: October 1, 2009

Citation
Kun Hua Wen, Lian Shan Yan, Wei Pan, Bin Luo, Xi Hua Zou, Jia Ye, and Ya Nan Ma, "Analysis for reflection peaks of multiple-phase-shift based sampled fiber Bragg gratings and application in high channel-count filter design," Appl. Opt. 48, 5438-5444 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-29-5438

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