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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 11 — May. 21, 2012
  • pp: 12095–12110

Direct design of high channel-count fiber Bragg grating filters with low index modulation

Hui Cao, Javid Atai, Xuewen Shu, and Guojie Chen  »View Author Affiliations

Optics Express, Vol. 20, Issue 11, pp. 12095-12110 (2012)

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a novel method for designing high channel-count fiber Bragg gratings (FBGs) is proposed. For the first time, tailored group delay is introduced into the target reflection spectra to obtain a more even distribution of the refractive index modulation. This approach results in the reduction of the maximum refractive index modulation to physically realizable levels. The maximum index modulation reduction factors are all greater than 5.5. This is a significant improvement compared with previously reported results. Numerical results show that the thus designed high channel-count FBG filters exhibit superior characteristics including 30 dB channel isolation, a flat-top and near 100% reflectivity in each channel.

© 2012 OSA

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: April 3, 2012
Revised Manuscript: April 29, 2012
Manuscript Accepted: April 30, 2012
Published: May 11, 2012

Hui Cao, Javid Atai, Xuewen Shu, and Guojie Chen, "Direct design of high channel-count fiber Bragg grating filters with low index modulation," Opt. Express 20, 12095-12110 (2012)

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