Fiber optic has extraordinary properties and is
suitable in sensor applications due to its special potential.
Currently, macro bending characteristics of newly developed
hetero core fiber optic element are designed and evaluated. This
paper presents the preliminary results obtained from the
numerical simulation analysis of the bending sensitivity of
U-shape fiber optics toward the 2D electromagnetic wave in terms
of mesh, curvature radius, core fiber size, and turn number. Fiber
optics with core sizes of 4, 9, 50, and 62.5 μm were designed. In
addition, the combination of core diameters 50-4-50, 50-9-50,
62.5-4-62.5, and 62.5-9-62.5 μm is evaluated to compare the
outcome of transmission power in terms of hetero core structure of
fiber optic. Simulation is performed using COMSOL Multiphysics
simulation tool. The developed U-shape fiber optic is designed to
sense the distortion of reducing power transmission by comparing
input and output power. Results show that the selected mesh
depends on the size of geometry bending fiber optics, and fine and
finer mesh is the best for U-shape fiber optic. Furthermore, the
power flow on the fiber decreases with the decreasing curvature
radius and increasing turn number. The fiber with a core size
combination of 62.5–4–62.5 um has high sensitivity in terms of
loss. The attained results possess higher potential in the field of
sensor applications, such as displacement, strain, pressure, and
monitoring respiration, on human body. This study serves as a
basis for further investigation of nanomaterial coating on fiber
optics, thereby enhancing its credibility for sensing.
Pendulum-Type Hetero-Core Fiber Optic Accelerometer for Low-Frequency Vibration Monitoring
