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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 4 — Feb. 21, 2005
  • pp: 1281–1290

Influence of cladding-mode coupling losses on the spectrum of a linearly chirped multi-channel fiber bragg grating

Hongpu Li, Yuusaka Nakamura, Kazuhiko Ogusu, Yunlong Sheng, and Joshua E. Rothenberg  »View Author Affiliations

Optics Express, Vol. 13, Issue 4, pp. 1281-1290 (2005)

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Influence of cladding-mode coupling losses on the spectrum of multi-channel fiber Bragg grating (FBG) has been numerically investigated on the basis of the extended coupled-mode equations. It has been shown that there exists a reflection slope in the spectrum of both the intra- and inter-channels due to the existences of the cladding modes. This slope could be larger than 1 dB when the induced index change is about 3×10-3, which makes the channels considerably asymmetric. For comparison, a 39-channel linearly chirped FBG with a channel spacing of 0.8 nm and a chromatic dispersion of -850 ps/nm has been designed and fabricated. The experimental results show good agreement with the numerical ones. Finally, one method to pre-compensate the reflection slope within the intra-channels has been proposed and successfully demonstrated.

© 2005 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(060.2340) Fiber optics and optical communications : Fiber optics components

ToC Category:
Research Papers

Original Manuscript: January 19, 2005
Revised Manuscript: January 19, 2005
Published: February 21, 2005

Hongpu Li, Yuusaka Nakamura, Kazuhiko Ogusu, Yunlong Sheng, and Joshua Rothenberg, "Influence of cladding-mode coupling losses on the spectrum of a linearly chirped multi-channel fiber bragg grating," Opt. Express 13, 1281-1290 (2005)

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