Improved spectral resolution of long-period fiber grating sensors for ultra-high temperature environments using narrow interferences between regenerated gratings

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Conference Proceeding
Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BGPP 2014, 2014
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We thermally regenerated long-period fiber gratings at 850°C. Two strong seed gratings 10cm apart interfere near 1550nm. The regenerated grating has narrow interference fringes above 20% deep and stable up to 1000°C ideal for high-temperature sensors. © 2014 OSA.
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