Temperature- and phase-independent lateral force sensor based on a core-offset multi-mode fiber interferometer.
A novel lateral force sensor based on a core-offset multi-mode fiber (MMF) interferometer is reported. High extinction ratio can be obtained by misaligning a fused cross section between the single-mode fiber (SMF) and MMF. With the variation of the lateral force applied to a short section of the MMF, the extinction ratio changes while the interference phase remains almost constant. The change of the extinction ratio is independent of temperature variations. The proposed force sensor has the advantages of temperature- and phase-independency, high extinction ratio sensitivity, good repeatability, low cost, and simple structure. Moreover, the core-offset MMF interferometer is expected to have applications in fiber filters and tunable phase-independent attenuators.
Dong
Bo
B
Department of Physics and Computer Science, Wilfrid Laurier University, Waterloo, Ontario, Canada. dbo1978@163.com
Zhou
Da-Peng
DP
Wei
Li
L
Liu
Wing-Ki
WK
Lit
John W Y
JW
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D008365:Manometry / Q000295:instrumentation*; D044367:Phase Transition; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013314:Stress, Mechanical; D013696:Temperature; D014159:Transducers