Analysis of the response of long period fiber gratings to external index of refraction

This paper demonstrates that the change in wavelength of a long period fiber grating attenuation band with changes in external index of refraction can be enhanced by proper selection of the grating period. We calculate and experimentally verify that the wavelength shift caused by changing the extern...

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Bibliographic Details
Published in:Journal of lightwave technology 1998-09, Vol.16 (9), p.1606-1612
Main Authors: Patrick, H.J., Kersey, A.D., Bucholtz, F.
Format: Article
Language:English
Subjects:
Applied sciences
Attenuation
Chemical sensors
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fiber gratings
Glass
Integrated optics. Optical fibers and wave guides
Laboratories
Optical and optoelectronic circuits
Optical attenuators
Optical coupling
Optical fiber filters
Optical fiber sensors
Optical fibers
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Summary:This paper demonstrates that the change in wavelength of a long period fiber grating attenuation band with changes in external index of refraction can be enhanced by proper selection of the grating period. We calculate and experimentally verify that the wavelength shift caused by changing the external index from n=1 to n=1.44 of the attenuation band which appears in the 1400-1600 nm region in a 200-/spl mu/m period grating is four times that in a 350-/spl mu/m period grating. Changes in the spectrum over a wavelength range from 1100 to 1600 nm and 1
ISSN:0733-8724
1558-2213
DOI:10.1109/50.712243