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Optics Letters

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  • Vol. 26, Iss. 16 — Aug. 15, 2001
  • pp: 1224–1226

Fiber-optic liquid-level sensor using a long-period grating

Sarfraz Khaliq, Stephen W. James, and Ralph P. Tatam  »View Author Affiliations


Optics Letters, Vol. 26, Issue 16, pp. 1224-1226 (2001)
http://dx.doi.org/10.1364/OL.26.001224


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Abstract

A liquid-level sensor based on the refractive-index sensitivity of long-period fiber-optic gratings is proposed and demonstrated. The form of the transmission spectrum of the long-period grating is dependent on the fraction of the length of the long-period grating that is surrounded by the liquid. The sensor shows a large linear range, with sensitivity of 4.8% change in transmission per millimeter, for a long-period grating with a length of 40 mm and a periodicity of 400mu;m .

© 2001 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors

Citation
Sarfraz Khaliq, Stephen W. James, and Ralph P. Tatam, "Fiber-optic liquid-level sensor using a long-period grating," Opt. Lett. 26, 1224-1226 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-16-1224


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