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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 31 — Nov. 1, 2009
  • pp: G95–G100

Analysis of transmission characteristics of long period gratings in tapered optical fibers

Krishna Chandra Patra, Rashmi Singh, Enakshi Khular Sharma, and Kiyotoshi Yasumoto  »View Author Affiliations


Applied Optics, Vol. 48, Issue 31, pp. G95-G100 (2009)
http://dx.doi.org/10.1364/AO.48.000G95


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Abstract

We report an analysis of the transmission characteristics of long period gratings written in a linearly tapered optical fiber. Such gratings are best analyzed by a coupled mode theory that includes several cladding modes simultaneously. However, the numerical solution needs to be modified to take into account the changing propagation constants along the length of the fiber. The transmission spectra show certain distinctive features that depend on the grating period and choice of the phase-matched coupled cladding modes. For low-order modes, the resonances broaden and tend to vanish as the taper of the angle increases. For higher-order modes, the resonances remain well defined but shift toward higher or lower wavelengths and broaden. The transmission spectrum is also highly sensitive to a change in the ambient atmosphere.

© 2009 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.3738) Fiber optics and optical communications : Fiber Bragg gratings, photosensitivity

History
Original Manuscript: June 19, 2009
Revised Manuscript: September 1, 2009
Manuscript Accepted: September 4, 2009
Published: October 7, 2009

Citation
Krishna Chandra Patra, Rashmi Singh, Enakshi Khular Sharma, and Kiyotoshi Yasumoto, "Analysis of transmission characteristics of long period gratings in tapered optical fibers," Appl. Opt. 48, G95-G100 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-31-G95


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References

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