Answers are grounded in this paper and cite their sources.
A compact fiber bending sensor has been presented by superimposing a uniform fiber Bragg grating (FBG) into a tilted fiber Bragg grating (TFBG). The reflection of FBG is modulated by the same bandwidth of the cladding modes of TFBG, which is sensitive to the bending of fiber. By monitoring the differential Bragg reflection between FBG and TFBG, the sensor is insensitive to ambient temperature changes and power fluctuations from light source or fiber link during the measurement. The sensitivity of the sensor is also doubled because the signal from FBG passes through the TFBG twice.
No takes yet. Share an insight, caveat, or question.
Dong et al. (2011) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: