水体参量对受激布里渊散射阈值及增益的影响  

Influence of Water Characteristic Parameters on Threshold Value and Gain of Stimulated Brillouin Scattering

作　　者：许锦 郭洋宁 胡芬 罗宁宁[1,2] 张余宝[1,2] 史久林 何兴道[1,2] XU Jin;GUO Yang-ning;HU Fen;LUO Ning-ning;ZHANG Yu-bao;SHI Jiu-lin;HE Xing-dao(Jiangxi Engineering Laboratory for ptoelectronics Testing Technology,Nanchang Hangkong University,Nanchang 330063,China;Key Laboratory of Nondestructive Test(Ministry of Education),Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学江西省光电检测技术工程实验室,南昌330063 [2]南昌航空大学无损检测技术教育部重点实验室,南昌330063

出　　处：《光子学报》2019年第12期250-257,共8页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.41666004,41776111,41576033,61865013,61665008);江西省自然科学基金(No.20171BAB202039);江西省杰出青年基金(No.20171BCB23053);南昌航空大学研究生创新专项资金(No.YC2018-S377)~~

摘　　要：针对水中受激布里渊散射阈值和增益这两个重要特征参量,理论分析了温度和盐度对水中受激布里渊散射增益的影响,同时采用耦合波方程与平均衰减系数相结合的方法,研究了阈值与温度和衰减系数的相关性.研究结果表明,受激布里渊散射的增益与温度和盐度正相关,随着温度和盐度的升高,受激布里渊散射增益增大;而受激布里渊散射阈值随着温度的增加而减小,随着衰减系数的增大而增大.研究结果对了解水中的受激布里渊散射过程提供理论依据.To investigate the two important characteristic parameters of threshold value and gain coefficient of Stimulated Brillouin Scattering(SBS)in water,the effects of temperature and salinity on SBS gain are analyzed theoretically,and meanwhile coupling wave equation combined with average attenuation coefficient are employed for analyzing the dependence of SBS threshold value on the temperature and attenuation coefficient of water.The results show that,SBS is positively correlated with temperature and salinity of water;the threshold value decreases with the increase of temperature and increases with the increase of attenuation coefficient.The results provide theoretical basis for understanding the SBS process in water.

关 键 词：受激布里渊散射 增益 阈值 温度 盐度 

分 类 号：O437.2[机械工程—光学工程]