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Miniaturized Optical Fiber Sensor Interrogation System Employing Echelle Diffractive Gratings Demultiplexer for Potential Aerospace Applications

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5 Author(s)
Gaozhi Xiao ; Inst. for Microstruct. Sci., Nat. Res. Council, Ottawa, ON ; Mrad, N. ; Fang Wu ; Zhiyi Zhang
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To enable the application of optical fiber sensors to aerospace vehicles, the sensor interrogation or data acquisition system has to meet small size and low weight requirements. This paper presents the developmental work of an echelle diffractive gratings (EDGs) demultiplexer-based optical fiber sensor interrogation system. The operation principle of this system and its application to fiber Bragg grating (FBG) sensor interrogation are presented. The experimental results have shown that the developed interrogator (not including the electronic controller) weighs less than 60 g and provides better than 1 pm measurement resolution and better than plusmn10 pm measurement accuracy.

Published in:

Sensors Journal, IEEE  (Volume:8 ,  Issue: 7 )