一种具有新型光电探头的光纤传感器

A New Optical Fiber Sensor with Smart Probe

本文作者首次提出了一种可用于光纤传感器技术的、性能优越的新型金属包层光波导。试验和理论分析计算表明：当此圆柱形金属包层光波导的直径为２００μｍ时，其损耗为０．０６ｄＢ／ｍｍ，损耗随金属包层长度的增加而线性增加．在制做光纤传感器时，使被测参数的变化导致金属包层长度的变化；通过测量金属包层光波导的损耗就可以测出金属包层长度的变化，进而测出被测参数。由于光功率及损耗的测量原理简单、精度高、造价低，为光纤传感器提供了一种成熟、经济的测量探头，通过大量的试验和传感器试制证明具有此种探头的光纤传感器性能优越、制作方便，是一种难得的光电探头。

The theory analysis and calculation on loss of a metal cladding optical guide has been given,and a large amount of experiment have been done.The results show that when the guide diameter is 200μm,its loss is 0.06dB/mm,varing linearly with the length.When the measured parameters affect the length of this guide clading,by measuring the loss,we can get the clading length and then measured parameters.For the loss measurement is accurate,cheap and easy,we can find a new good method to make up optical fiber sensor.