By Topic

Multiplexing of Long-Length Fiber Bragg Grating Distributed Sensors Based on Synthesis of Optical Coherence Function

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Kajiwara, K. ; Dept. of Electr. Eng. & Inf. Syst., Univ. of Tokyo, Tokyo, Japan ; Hotate, K.

Long-length fiber Bragg grating (FBG) distributed sensors are multiplexed, and measurement of Bragg wavelength distribution along the gratings are demonstrated. This sensing system adopts synthesis of optical coherence function (SOCF) as a reflectometry technique to measure the distribution of the local reflection spectra inside the long-length FBGs. Simulations have been carried out to determine appropriate FBG reflectivity for the multiplexing. In the proposed system, which is a heterodyne interferometer, heterodyne beat frequency for each FBG gets different from those for the others, when the measurement speed becomes higher. By introducing a way for compensating the difference, three long-length distributed FBG sensors, which are originally uniform and have the same Bragg wavelength, are successfully multiplexed with 1 kHz sampling rate.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 21 )