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Temperature Fiber Laser Sensor Based on a Hybrid Cavity and a Random Mirror

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4 Author(s)
Rodrigues Pinto, A.M. ; Dept. de Ing. Electr. y Electron., Univ. Publica de Navarra, Pamplona, Spain ; Lopez-Amo, M. ; Kobelke, J. ; Schuster, K.

In the present work, a simple temperature fiber laser sensor configuration is proposed. The temperature fiber laser sensor is based in the combination of a Fabry-Perót hybrid cavity and a random mirror. The Fabry-Perót hybrid cavity is fabricated by splicing a single mode fiber with a small piece of suspended-core fiber. The random mirror is created by multiple Rayleigh scattering events running along the dispersion compensation fiber, as a direct consequence of Raman gain in this fiber. In the proposed configuration, the Fabry-Perót cavity presents simultaneously a double function: laser reflective mirror and temperature sensing cavity. The proposed temperature fiber laser sensor presents maximum output power of ~4 mW in a 15nm wavelength range while providing a temperature sensibility of ~6 pm/°C, in a 200°C temperature range.

Published in:

Lightwave Technology, Journal of  (Volume:30 ,  Issue: 8 )

Date of Publication:

April15, 2012

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