中国激光, 2008, 35 (6): 884, 网络出版: 2008-06-06
激光脉冲制作的长周期光纤光栅/法布里-珀罗高温-应变组合传感器
Simultaneous Measurement of High-Temperature and Strain Using a Combined Long-Period Fiber Grating/Fabry-Perot Sensor Fabricated by Laser Pulses
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
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157 nm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。
Abstract
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-optic sensor can stand for high temperature of 500 ℃ and achieve precise measurement of strain under high temperature environments simultaneously.
廖弦, 饶云江, 冉曾令, 邓洪有. 激光脉冲制作的长周期光纤光栅/法布里-珀罗高温-应变组合传感器[J]. 中国激光, 2008, 35(6): 884. Liao Xian, Rao Yunjiang, Ran Zengling, Deng Hongyou. Simultaneous Measurement of High-Temperature and Strain Using a Combined Long-Period Fiber Grating/Fabry-Perot Sensor Fabricated by Laser Pulses[J]. Chinese Journal of Lasers, 2008, 35(6): 884.
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