摘要
利用逐点写入法在耐高温光纤中用红外飞秒激光直接写入了长周期光纤光栅,研究了光栅的高温温度特性,并做了理论分析.通过对含耐高温涂覆层的长周期光纤光栅进行20℃～300℃的温度传感实验,结果表明:在高温段光栅的谐振波长漂移量与温度之间仍能保持大的灵敏度(0.060 5nm/℃)和好的线性度,且光纤耐高温涂覆层不受破坏,光纤耐高温涂覆在高温下不会出现碳化现象,光栅传感性能良好.实验证明该方法制作的光栅适合于长期在高温环境下使用,应用价值巨大.
Using Point-by-Point method, long period fiber gratings were inscribed in the high temperature resistant fiber by an infrared femtosecond laser. Characteristics of the high temperature resistant fiber was analyzed theoretically. The experiment with long period fiber gratings contained high temperature resistant coating layer indicates that the shift of resonant peak at the temperature range from 20 ℃ -300 ℃ keeps a good linearity and the temperature sensitivity is 0. 060 5 nm/℃. The coating of the long period fiber gratings is not carbonized due to the existence of the high temperature resistant polyimide materials and grating sensor with good performance. The result shows that the high temperature resistant long period fiber gratings can be used in the high temperature environment for long term application.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2011年第10期1490-1493,共4页
Acta Photonica Sinica
基金
国家自然科学基金(No.60808002)
上海市重点学科建设项目(No.S30105)资助
关键词
长周期光纤光栅
飞秒激光脉冲
耐高温光纤
高温光纤传感
Long period fiber grating
Femtosecond laser
High temperature resistant fiber
High temperature fiber sensing
