Shi Jiulin, Yuan Dapeng, Xu Jin, Guo Yangning, Luo Ningning, Li Shujing, He Xingdao
Opt Express. 2020 Dec 21;28(26):39038-39047. doi: 10.1364/OE.413157.
Effects of temperature and pressure on the threshold value of stimulated Brillouin scattering (SBS) in seawater were analyzed theoretically and experimentally. Theoretically, the change of threshold value of SBS versus the ocean depth was simulated based on the International Thermodynamic Equation of Seawater-2010 (TEOS-10) and the World Ocean Atlas 2013 (WOA13). Experimentally, an ocean temperature and pressure simulator (OTPS) was designed to measure the threshold value of SBS through simulating the changes of temperature and pressure of seawater in 0∼1000 meters. The theoretical and experimental results exhibit that the threshold value of SBS decreases with the increase of temperature at the same seawater pressure and increases with the increase of pressure at the same seawater temperature. The results imply that the SBS process is more likely to occur in upper seawater of lower-latitude areas. The theoretical and experimental results are helpful for remote sensing in ocean using the SBS LIDAR.
从理论和实验两方面分析了温度和压力对海水中受激布里渊散射（SBS）阈值的影响。理论上，基于国际海水热力学方程-2010（TEOS-10）和2013年世界海洋图集（WOA13）模拟了SBS阈值随海洋深度的变化。实验上，设计了一个海洋温度和压力模拟器（OTPS），通过模拟0至1000米深度海水温度和压力的变化来测量SBS阈值。理论和实验结果表明，在相同海水压力下，SBS阈值随温度升高而降低；在相同海水温度下，SBS阈值随压力升高而升高。结果表明，SBS过程更有可能发生在低纬度地区的上层海水中。理论和实验结果有助于利用SBS激光雷达进行海洋遥感。
