Remote sensing of the aquatic environment by semiconductor laser-induced fluorescence lidar

A portable laser induced fluorescence (LIF) lidar system (total weight about 5 kg) was developed for real-time remote sensing oil in aquatic environment. LIF lidar consists of 405nm semiconductor laser, receiving telescope, double Amici prism spectrometer and ICCD detecting system, which can detect fluorescence signal in the spectral range of 400-750 nm. In the laboratory, the fluorescence spectra of water samples with different oil concentration were investigated. The contents of oil were calculated using the ratio between fluorescence and intensity. The LIF lidar system has the advantages of compact configuration and low cost, which is promising for monitoring water quality rapidly. The portable system can be installed on small aircrafts, unmanned aerial vehicles, ships, and shore platform for remote monitoring aquatic environments.