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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 8 — Aug. 1, 2006
  • pp: 1511–1516

Effects of the phase shift split on phase-shifted fiber Bragg gratings

Guillaume Tremblay and Yunlong Sheng  »View Author Affiliations

JOSA B, Vol. 23, Issue 8, pp. 1511-1516 (2006)

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In proximity side-writing fiber Bragg gratings (FBGs) using a phase shifted phase mask, the phase shift in the phase mask is split into two half-amplitude phase shifts. The effects of the phase-shift split on FBGs is investigated. A FBG with a split π-phase shift is modeled as two cascaded and tightly coupled grating-based Fabry–Perot filters. A compact expression of its reflectivity spectrum is obtained showing spectral asymmetry errors and a shift of the transmission peak. Our numerical results are in good agreement with previous experimental results. These effects decrease with increasing FBG length and become negligible for gratings more than a few millimeters long.

© 2006 Optical Society of America

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(050.2770) Diffraction and gratings : Gratings

ToC Category:
Diffraction and Gratings

Original Manuscript: October 7, 2005
Revised Manuscript: February 27, 2006
Manuscript Accepted: March 9, 2006

Guillaume Tremblay and Yunlong Sheng, "Effects of the phase shift split on phase-shifted fiber Bragg gratings," J. Opt. Soc. Am. B 23, 1511-1516 (2006)

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