Fiber-based polarimetric stress sensor for measuring the Young's modulus of biomaterials

摘要: Polarimetric optical fiber-based stress and pressure sensors have proven to be a robust tool for measuring detecting changes in the Young’s modulus (E) of materials response external stimuli, including real-time monitoring structural integrity bridges buildings. These typically work by using pair polarizers before after sensing region fiber, often require precise alignment achieve high sensitivity. The ability perform similar measurements natural engineered biomaterials could provide significant insights enable research advancement preventative healthcare. However, order this approach successful, it is necessary reduce complexity system removing free-space components need alignment. As first step path, we developed new route performing these measurements. By generalizing expanding established theoretical analyses types sensors, predictive model. Additionally, replacing conventional free space polarization filters with polarimeter, constructed sensor higher sensitivity which semi-portable. In initial experiments, series polydimethylsiloxane (PDMS) samples several base:curing agent ratios ranging from 5:1 up 30:1 were prepared simulate tissues different stiffnesses. simultaneously producing stress-strain curves load frame change light traveling through samples, verified accuracy our