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Conferences > OFS > 2020 > T3 > T3.57

Gain-flattening of identical weak FBG array laser sensor using intensity-modulated resonance frequency mapping

Gyeong Hun Kim, Chang-Seok Kim, Hyunjoo Kim, Yong Seok Kwon, Ga-ye Park, and Jaesun Kim

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Abstract

We demonstrated a novel intensity-modulated interrogation system for an identical weak fiber Bragg grating (FBG) array based on a resonance frequency mapping technique. To compensate for the signal depletion phenomenon because of the increased reflection number of identical weak FBGs, a gain-flattening technique is employed based on the intensity modulation of the applied driving current in the optical fiber laser sensor cavity. Over 60 identical FBGs can be efficiently interrogated by detecting the resonance frequency of each FBG for a distinguished peak position.

© 2020 The Author(s)

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