Dynamic response of lightweight structures is affected by the mass of a transducer. The additional mass of the transducer
is defined as a mass loading for the system, which is comparable to the weight of the structures, such as composites and
thin cantilever beam/bar. In this paper, we measure the bending and torsion mode frequencies with and without mass
loading to the lightweight structures by using lightweight optical fiber sensor (OFS) and conventional accelerometer.
The frequency difference is verified by the finite element method using ANSYS software. The OFS, benefited to its
lightweight, has shown the advantage of measuring vibration frequency accurately without affecting the dynamic
response of the structure.
An optical fiber vibration/acoustic sensor based on polarization diversity scheme has been developed to study the
vibration of the highway pavement slabs with vehicles passing. This process induced the birefringence change in a 50m
sensing fiber embedded along the FRP bars. The damping of the impact in time domain and a 2Hz vibration frequency
Using a fast polarization mode dispersion (PMD) with 15-second interval and long measurement duration (>24h), we
found the correlation between polarization effects, tides and sun radiation on submarine fibers. We also found that
using state of polarization measurement we can measure the vibration frequency of the optical fibers.
A polarization dependent loss (PDL) vector equation of motion in Stokes space was derived in a system interacting with polarization mode dispersion (PMD). A new PDL measurement method based on the PDL vector equation was proposed and validated by numerical simulation and experiment.