Using oscilloscope to measure optical fiber length

Abstract

The polarization of light is one of the fundamental concepts used in fiber optic sensors. Combination of polarization measurement and interferometry seems to be promising concept of future fiber optic based sensors. We have developed a cheap and easy concept of fiber optic precise length measurement which is needed for construction of fiber ring resonators used as the light source for this combined type of sensors. This paper presents a detailed description of the measurement setup, calibration and measurement.