摘要
在很多高温环境应用中,诸如发动机、飞机和宇航器、复合材料的健康监测,需要精确测量应变。针对这种场合提出了一种基于激光脉冲制作的长周期光纤光栅/法布里-珀罗(LPFG/F-P)温度-应变组合光纤传感器。该传感器由长周期光纤光栅与光纤法布里-珀罗干涉传感器级联构成,其中长周期光纤光栅由高频CO2激光脉冲制作,用于监测温度;光纤法布里-珀罗干涉传感器由157nm准分子激光脉冲制作,用于监测应变。这种新型组合光纤传感器最大的特点是能承受500℃的高温并能在高温环境下实现应变的精确测量,可望在高温恶劣环境条件下的结构(如飞机发动机)健康监测、复合材料生产过程监测等应用中发挥重要作用。
A novel fiber-optic sensor consisting of a long-period fiber grating (LPFG) and a Fabry-Perot (F-P) interferometric sensor is proposed and demonstrated for simultaneous measurement of high-temperature and strain. The LPFG and fiber F-P sensor form the sensor in cascade. The LPFG written by high frequency CO2 laser pulses is used for high temperature measurement while the F-P sensor fabricated by 157 nm excimer laser pulses is used for strain measurement. Such combined fiber-optlc sensor can stand for high temperature of 500 ~C and achieve precise measurement of strain under high temperature environments simultaneously.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2008年第6期884-888,共5页
Chinese Journal of Lasers
基金
国家自然科学基金重点项目(60537040)资助课题
关键词
光纤光学
光纤传感器
长周期光纤光栅
法布里-珀罗光纤传感器
激光微加工
高温
应变
fiber optics
optical fiber sensor
long period fiber grating
fiber-optic Fabry-Perot sensor
laser micromachining
high temperature
strain gauge