Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

作     者：DONG Wu-qin JIA Zhen-hong 

作者机构：College of Information Science and Engineering Xinjiang university Urumqi 830046 China 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2008年第4卷第4期

页      面：276-279页

核心收录：

学科分类：070207[理学-光学] 07[理学] 080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：Talent Supporting Project of Educa-tion Ministry of China (Grant No. NCET-05-0897) Scientific Research Project for Universities in Xinjiang (Grant No. XJEDU2004 E02 and XJEDU2006110) 

主　　题：应力测量 光纤传感器 布里渊散射增益系数 理论分析 

摘      要：The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.