摘要
介绍了一种基于连续的抽运—探测光相关的布里渊分布式光纤传感器新技术,该技术采用频率调制连续的抽运光和探测光,通过检测沿光纤的后向布里渊散射光的频移实现温度和应变的分布式测量,其空间分辨力可达1cm,比常规基于脉冲抽运光的布里渊光时域分析仪(BOTDA)技术的分辨力高近两个数量级。还结合常规BOTDA讨论了该新技术高分辨力的优势和测量范围受限制的不足。
<Abstrcat>A novel Brillouin distributed fiber sensing technique based on the correlation of continuous pump-probe lightwave is presented.With the frequency modulation of continuous pump-probe wave and measuring the Brillouin frequency shift,its spatial resolution can reach 1cm,which is about 2-order higher than that of traditional pulse-based BOTDA.It can be applied to smart structure or materials like airplane′ wing as a nervous system to monitor strain and temperature.The advantages of its spatial resolution and the limit to its measurement range are discussed in comparison with the traditional pulse-based technique.
出处
《光学仪器》
2005年第3期70-74,共5页
Optical Instruments
基金
浙江省自然科学基金资助项目(M603127)
