Analysis of Brillouin LIDAR equation and maximum detection depth in ocean telemetry

Brillouin Light Detection and Ranging (LIDAR) in ocean telemetry can be used for remote sensing of sound velocity, temperature and salinity profiles in the ocean. It is one of the most promising technologies to survey the ocean rapidly, for its virtues of flexibility, efficiency and high accuracy. On the basis of the pulse transmission process of stimulated Brillouin scattering (SBS), a Brillouin LIDAR equation is obtained, and the relationships between maximum detection depth and output energy per pulse of laser and attenuation coefficient of light in seawater are analyzed. The results show that increasing output energy of laser can improve the maximum detection depth of LIDAR system to a certain extent, and increasing the attenuation coefficient will lead to rapidly decline the maximum detection depth.