LIDAR system for differential absorption measurement and background distance measurement

摘要

PROBLEM TO BE SOLVED: To realize both performing IPDA (Integrated Path Differential Absorption) measurement and determining a separation distance from an obstacle existing in the background of a measurement area, which is achievable using an optical fiber. LIDAR system is provided. A lidar system performs differential absorption measurements of chemical compounds between two separate optical frequencies (ν 1 , ν 2 ) to determine the distance from obstacles in the background of the measurement region where absorption occurs. It is configured to measure. To allow the lidar system to implement fiber optic technology while having sufficient emission power, the emission light power value is varied between different time intervals between emission emission sequences. The lidar system makes it possible to assess the amount of chemical compounds contained in the measurement area and the distance from obstacles located in the background of the measurement area. [Selection diagram] FIG. 1a