Title :
Distributed Bragg reflector fibre laser-based sensor array for multi-parameter detection
Author :
Kuanglu Yu ; Chongqing Wu ; Yaya Mao ; Zhi Wang ; Chao Lu ; Hwa-Yaw Tam ; Yao Zhao
Author_Institution :
Inst. of Opt. Inf., Beijing Jiaotong Univ., Beijing, China
Abstract :
A sensor array employing the distributed Bragg reflector (DBR) fibre laser is presented. This array could be utilised as a multi-channel multi-functional detector for bending radius, transverse load and axial strain by simultaneously monitoring the lasing wavelength and the output beat note frequency. The measurement theory of the DBR fibre laser is explained, and it is then experimentally verified with a three-probe array. The system´s detection sensitivities for curvature, transverse load and axial strain are found to be 600 MHz/cm-2, 1.3 MHz/g and 1.263 pm/με, respectively.
Keywords :
distributed Bragg reflector lasers; fibre lasers; fibre optic sensors; optical arrays; strain measurement; strain sensors; DBR fibre laser; axial strain sensitivity; bending radius; curvature sensitivity; distributed Bragg reflector fibre laser; lasing wavelength; measurement theory; multichannel multifunctional detector; multiparameter detection; output beat note frequency; sensor array; three-probe array; transverse load sensitivity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.1800
