A reflective intensity-modulated fiber optic sensor (FOS) is employed to detect surface defects on bearings. The structural parameters of the FOS are simulated through Matlab, considering the inner/outer diameter, numerical aperture, and axial spacing of the sensor. However, regarding the subject matter, little information has been published. 00 + tax (Refund Policy) Author: Zhu, Xiaojuan Source: Journal of Nanoelectronics and Optoelectronics, Volume 18, Number 12, December 2023, pp. Fiber optic sensing works by measuring changes in the “backscattering” of light occurring in an optical fiber when the fiber encounters vibration.