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Sensor Applications Based on the Cutoff Properties of Liquid-Filled Ge-Doped Microstructured Fibers

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4 Author(s)
Torres-Peiro, S. ; Dept. de Fis. Aplic. y Electromagnetismo, Univ. de Valencia, Burjassot, Spain ; Diez, A. ; Cruz, J.L. ; Andres, M.V.

The cutoff properties of the fundamental mode of liquid filled Ge-doped microstructured fiber can be exploited in a novel set of wavelength encoded sensor applications. A number of temperature, strain and vibration sensors have been implemented using a Ge-doped core Y-shaped microstructured fiber. The temperature sensitivity of the cutoff wavelength is 25 nm/°C, more than two orders of magnitude higher than the values reported for fiber Bragg gratings. Similarly, the strain sensitivity is 16.8 pm/μ∈, about one order of magnitude higher than a fiber Bragg grating. Amplitude interrogation of the sensor heads can be implemented in rather easy configurations using a light emitting diode or a laser diode, without requiring an accurate selection of the laser wavelength. This permits, for example, the development of vibration sensors with fast time response, at least better than 0.1 ms.

Published in:

Sensors Journal, IEEE  (Volume:10 ,  Issue: 7 )

Date of Publication:

July 2010

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