Optical fiber sensor with phase-shifted long-period fiber gratings

Mei Kong; Wen Zhou; Weizhong Tang

doi:10.1117/12.318188

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13 August 1998 Optical fiber sensor with phase-shifted long-period fiber gratings

Mei Kong, Wen Zhou, Weizhong Tang

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Proceedings Volume 3555, Optical and Fiber Optic Sensor Systems; (1998) https://doi.org/10.1117/12.318188
Event: Photonics China '98, 1998, Beijing, China

Abstract

We point out that a long-period fiber grating with (pi) phase shift at the center has a transmission window in the center of the stopband. Basing on the transfer matrix treatment we calculate the output spectra of the phase-shifted long period fiber gratings. When the grating total sustains temperature or strain variation, the bright peak will move with the absorbing band and its wavelength shift can be detected to show the variation. The transmission window is a bright signal and easy to be detected.

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Mei Kong, Wen Zhou, and Weizhong Tang "Optical fiber sensor with phase-shifted long-period fiber gratings", Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); https://doi.org/10.1117/12.318188

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