Brillouin lidar and related basic physics

Abstract

The principle of a lidar based on Brillouin scattering is introduced. The basic physics of the Brillouin lidar is discussed. The applications of the Brillouin lidar in remote sensing of the ocean, such as measurement of the sound speed and the bulk viscosity of water and detecting submerged objects are investigated. An actual Brillouin lidar system is developed. Also, several basic problems related to Brillouin lidar are studied in detail. The attenuation coefficient of a pulsed laser beam with high pulsed energy in water is investigated; it is helpful to reveal the propagation property of a laser beam in water. The investigations on the threshold value of SBS are made theoretically and experimentally. Finally, a novel phenomena is investigated experimentally, in which Stimulated Raman scattering can be enhanced by stimulated Brillouin scattering.

Comparison of three technique of Brillouin lidar for remote sensing of the ocean

“…Also, it can be used for detecting submerged object [6]. The present authors did a lot work [14][15][16][17] on the Brillouin lidar,and improved the systems by three techniques. Recently, professors Kun Liang and Yong Ma proposed a processing method of spectral measurement can improve greatly the performance of Brillouin lidar.…”