Determination of bulk viscosity of liquid water via pulse duration measurements in stimulated Brillouin scattering  

作　　者：葛媛 史久林 朱开兴 何兴道 

机构地区：[1]Key Laboratory of Nondestructive Test (Ministry of Education),Nanchang Hangkong University

出　　处：《Chinese Optics Letters》2013年第11期110-114,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Sci-ence Foundation of China under Grants Nos.41206084 and 61177096

摘　　要：We present a method by which to determine the bulk viscosity of water from pulse duration measurements of stimulated Brillouin scattering （SBS）. Beginning from a common model of Brillouin scattering, the bulk viscosity is shown to play an important role in Brillouin linewidth determination. Pulse durations of SBS back-reflected optical pulses are measured over the temperature range of 5-40℃. SBS linewidths are de- termined via Fourier transformation of the time-domain results, and the bulk viscosity of water is measured and derived from the obtained values. Our results show that the proposed method for measurement of pulse durations is an effective approach for determining bulk viscosity. The method can be easily extended to determine bulk viscosities of other Newtonian liquids.We present a method by which to determine the bulk viscosity of water from pulse duration measurements of stimulated Brillouin scattering （SBS）. Beginning from a common model of Brillouin scattering, the bulk viscosity is shown to play an important role in Brillouin linewidth determination. Pulse durations of SBS back-reflected optical pulses are measured over the temperature range of 5-40℃. SBS linewidths are de- termined via Fourier transformation of the time-domain results, and the bulk viscosity of water is measured and derived from the obtained values. Our results show that the proposed method for measurement of pulse durations is an effective approach for determining bulk viscosity. The method can be easily extended to determine bulk viscosities of other Newtonian liquids.

关 键 词：SBS Determination of bulk viscosity of liquid water via pulse duration measurements in stimulated Brillouin scattering 

分 类 号：O437.2[机械工程—光学工程] TQ591[理学—光学]