| 水中受激布里渊散射阈值的研究 |
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| 引用本文： | 史久林,何兴道,刘娟,李淑静,赵希圣,郭志军.水中受激布里渊散射阈值的研究[J].应用光学,2009,30(5):869-873. |
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| 作者姓名： | 史久林 何兴道 刘娟 李淑静 赵希圣 郭志军 |
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| 作者单位： | 南昌航空大学,自动化学院无损检测技术教育部重点实验室,江西,南昌,330063 |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863项目)(2002AA633110)资助课题 |
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| 摘 要： | 在对水中受激布里渊散射阈值的研究中,针对传统定义上的不足,提出一种新的定义和新的测量方法.测量了不同能量的光束在不同长度的水介质中传输,在宽线宽和窄线宽情况下水的衰减系数.通过水的衰减系数的变化来确定不同情况下受激布里渊散射的阈值.试验发现,水中的受激布里渊阈值在理想稳态和理想瞬态下是一个常数,只与泵浦激光和介质属性有关,和介质长度无关;在中间情况下,受激布里渊阈值是否与介质长度有关,还要根据具体情况来分析.
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| 关 键 词： | 受激布里渊散射 衰减系数 散射阈值 |
| 收稿时间： | 2008/12/31 |
Threshold study of stimulated Brillouin scattering in water |
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| SHI Jiu-lin,HE Xing-dao,LIU Juan,LI Shu-jing,ZHAO Xi-sheng,GUO Zhi-jun.Threshold study of stimulated Brillouin scattering in water[J].Journal of Applied Optics,2009,30(5):869-873. |
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| Authors: | SHI Jiu-lin HE Xing-dao LIU Juan LI Shu-jing ZHAO Xi-sheng GUO Zhi-jun |
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| Abstract: | In order to solve the insufficiency in the traditional definition for SBS threshold, a new definition and a noval measuring technique are proposed. The transmission of beam with different energy was measured at different lengths of water, and the attenuation coefficient of laser beam with different pulse energy was tested. The SBS threshold under different conditions was confirmed based on the attenuation coefficient. It was found during the experiment that the SBS threshold under the ideal stable state and the ideal transient state is a constant, it is related only to the pump laser and medium attribute, but not to the medium length. To other cases, the relationship between SBS threshold and length will be studied through further experiment. |
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| Keywords: | stimulated Brillouin scattering attenuation coefficient scattering threshold |
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