Multiplexing Scheme of Long-Period Grating Sensors Based on a Modified Optical Frequency Domain Reflectometry
2008 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 20, no 21-24, 1962-1964 p.Article in journal (Refereed) Published
We propose a novel quasi-real-time sensing scheme by employing a modified optical frequency domain reflectometry technique to multiplex long-period grating (LPG) sensors of transmission mode. Different sensing signals are demodulated by different beat signals through presetting different values for the optical path differences between the measuring arms and a static reference arm. The amplitude of each beat signal is associated with the transmissivity of a sensing LPG. The present multiplexing scheme has the advantages of real-time, high speed, high sensitivity, large capacity, and high resolution over an intermediate length. A measurement of fiber bending curvature is demonstrated to verify good performances of the present LPG sensing system.
Place, publisher, year, edition, pages
2008. Vol. 20, no 21-24, 1962-1964 p.
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-33419DOI: 10.1109/LPT.2008.2005531ISI: 000261847800069ScopusID: 2-s2.0-57049179508OAI: oai:DiVA.org:kth-33419DiVA: diva2:415095
QC 201105052011-05-052011-05-052013-11-19Bibliographically approved