Microwave Photonics Filtering Technique for Interrogating a Very-Weak Fiber Bragg Grating Cascade Sensor

A system to interrogate photonic sensors based on a very weak fiber Bragg grating cascade fiber is presented and experimentally validated and dedicated to detecting the presence and location of a spot event. The distributed sensor proposed consists of a 5-m-long fiber, containing 500 9-mm-long Bragg...

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Published in:IEEE photonics journal 2014-12, Vol.6 (6), p.1-10
Main Authors: Ricchiuti, A. L., Hervas, J., Barrera, D., Sales, S., Capmany, J.
Format: Article
Language:English
Subjects:
Bragg gratings
Cascades
Discrete-time sensor
fiber Bragg gratings
Fiber gratings
fiber optic sensors
Fibers
Microwave filters
Microwave photonics
microwave photonics filters
Modulators
Optical fiber sensors
Optical filters
Photonics
Sensors
Spots
weak FBGs
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cited_by cdi_FETCH-LOGICAL-c438t-87c28148bfbd231d444d68593185c34bfc7c9c88e36d4bd106f03f293f75e2c83
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container_title IEEE photonics journal
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creator Ricchiuti, A. L.
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Barrera, D.
Sales, S.
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description A system to interrogate photonic sensors based on a very weak fiber Bragg grating cascade fiber is presented and experimentally validated and dedicated to detecting the presence and location of a spot event. The distributed sensor proposed consists of a 5-m-long fiber, containing 500 9-mm-long Bragg gratings with a grating separation of 10.21 mm. The principle of operation is based on a technique used to analyze microwave photonics filters. The detection of spot events along the sensor is demonstrated with remarkable accuracy under 1 mm, using a photodetector and a modulator with a bandwidth of only 500 MHz. The simple proposed scheme is intrinsically robust against environmental changes and is easy to reconfigure.
doi_str_mv 10.1109/JPHOT.2014.2363443
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source IEEE Xplore Open Access Journals
subjects Bragg gratings
Cascades
Discrete-time sensor
fiber Bragg gratings
Fiber gratings
fiber optic sensors
Fibers
Microwave filters
Microwave photonics
microwave photonics filters
Modulators
Optical fiber sensors
Optical filters
Photonics
Sensors
Spots
weak FBGs
title Microwave Photonics Filtering Technique for Interrogating a Very-Weak Fiber Bragg Grating Cascade Sensor
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