中国物理B ›› 2013, Vol. 22 ›› Issue (7): 74207-074207.doi: 10.1088/1674-1056/22/7/074207

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Effect of water temperature on pulse duration and energy of stimulated Brillouin scattering

张磊a, 张东b, 李金增a   

  1. a National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
    b Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
  • 收稿日期:2012-11-29 修回日期:2013-01-14 出版日期:2013-06-01 发布日期:2013-06-01

Effect of water temperature on pulse duration and energy of stimulated Brillouin scattering

Zhang Lei (张磊)a, Zhang Dong (张东)b, Li Jin-Zeng (李金增)a   

  1. a National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
    b Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
  • Received:2012-11-29 Revised:2013-01-14 Online:2013-06-01 Published:2013-06-01
  • Contact: Zhang Lei E-mail:zhanglei@nao.cas.cn

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摘要： The water temperature has a strong effect on the kinematic viscosity, which is inversely proportional to the phonon lifetime and the gain coefficient. The higher the temperature is, the smaller the kinematic viscosity is, and the larger the phonon lifetime is. At a low pump power and a short focal length, we can derive a single-peak stimulated Brillouin scattering (SBS) pulse. The duration of this single-peak SBS pulse depends mainly on the phonon lifetime of water. With the raise of the water temperature, the duration of such a single-peak SBS pulse will become longer, and the SBS energy will become higher for the gain coefficient, which is related to the phonon lifetime. Therefore, varying the medium temperature can lead to the changes of SBS pulse duration and SBS energy.

关键词: stimulated Brillouin scattering, pulse duration and energy, water temperature, phonon lifetime

Abstract: The water temperature has a strong effect on the kinematic viscosity, which is inversely proportional to the phonon lifetime and the gain coefficient. The higher the temperature is, the smaller the kinematic viscosity is, and the larger the phonon lifetime is. At a low pump power and a short focal length, we can derive a single-peak stimulated Brillouin scattering (SBS) pulse. The duration of this single-peak SBS pulse depends mainly on the phonon lifetime of water. With the raise of the water temperature, the duration of such a single-peak SBS pulse will become longer, and the SBS energy will become higher for the gain coefficient, which is related to the phonon lifetime. Therefore, varying the medium temperature can lead to the changes of SBS pulse duration and SBS energy.

Key words: stimulated Brillouin scattering, pulse duration and energy, water temperature, phonon lifetime

中图分类号:  (Stimulated Brillouin and Rayleigh scattering)

  • 42.65.Es
78.35.+c (Brillouin and Rayleigh scattering; other light scattering) 42.62.Eh (Metrological applications; optical frequency synthesizers for precision spectroscopy)