Calibration of laser distance meter using Opto-Electronic oscillator

Laser-based Electronic Distance Meters (EDMs) are used extensively to measure inner/outer dimensions in constructions and large volumes. Therefore, it needs to be calibrated regularly to assure its proper function. In this paper, a distance measurement system based on Opto-Electronic Oscillator (OEO) is used for EDM calibration. The calibration is performed in three steps; the first step is to construct a reference OEO system using off-the-shelf optical telecommunication components. Then, the OEO system is used to calibrate an indoor baseline consisting of eleven distances ranging from 2.4 to 58 m. Finally, the calibrated baseline is used to calibrate the EDM.