Title :
A Compact Sagnac Loop Based on a Microfiber Coupler for Twist Sensing
Author :
Ye Chen ; Semenova, Yuliya ; Farrell, Gerald ; Fei Xu ; Yan-qing Lu
Author_Institution :
Nat. Lab. of Solid State Microstructures, Nanjing Univ., Nanjing, China
Abstract :
We present a compact highly sensitive microfiber coupler-based twist sensor formed by fusing and tapering two optical fibers and then connecting two of the pigtails to form a Sagnac loop. The device is miniature, low cost, and easily fabricated. The sensor has high twist sensitivities of ~0.9 nm/° when measuring wavelength shift and ~0.16 dB/° when measuring transmission power, both of which confirm that the sensor has good potential for application in the structural health monitoring and other areas.
Keywords :
fibre optic sensors; micro-optics; microsensors; optical fibre couplers; optical fibre fabrication; optical fibre testing; spectral line shift; Sagnac loop based microfiber coupler; optical fiber fabrication; optical fiber fusing; optical fiber tapering; structural health monitoring; transmission power measurement; twist sensing; wavelength shift measurement; Couplers; Couplings; Optical fiber couplers; Optical fiber sensors; Sensitivity; Sagnac loop; Twist sensor; microfiber coupler;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2478479
