LIDAR SYSTEM FOR MEASURING DIFFERENTIAL ABSORPTION AND BACKGROUND DISTANCE

摘要

A LIDAR system is suitable for performing differential absorption measurements of a chemical compound between two distinct optical frequencies (ν1, ν2), and measuring a distance d distance from an obstacle which is present in the background of a measurement zone where the absorption occurs. A transmit optical power value is varied between different time intervals during a radiation transmit sequence, to enable realization of the LIDAR system by fiber optic technology, while having a power of sufficient emission. The LIDAR system makes it possible to evaluate a quantity of the chemical compound which is contained in the measurement zone, as well as a distance away from an obstacle which is situated in the background of said measurement zone.