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Conferences > CLEO_SI > 2012 > CM1F > CM1F.8

A compact first-order Bragg grating in a tapered fiber probe for high temperature sensing

Jun-long Kou, Sun-jie Qiu, Fei Xu, and Yan-qing Lu

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Abstract

We experimentally demonstrate an all-silica first-order fiber Bragg grating (FBG) for high temperature sensing by focused ion beam (FIB) machining in a fiber probe tapered to a point. This 61-period FBG is compact (~ 36.6 μm long and ~ 6.5 μm in diameter) with 200-nm-deep shallow grooves. We have tested the sensor from room temperature to around 500 °C and it shows a temperature sensitivity of nearly 20 pm/°C near the resonant wavelength of 1550 nm.

© 2012 Optical Society of America

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