超低温度系数的光子晶体光纤Sagnac压力传感器  

Temperature-insensitive lateral force sensor based on photonic crystal fiber Sagnac interferometer

作　　者：祖鹏[1,2] 向望华[1,2] 白扬博[1,2] 金永兴 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]天津大学光电信息技术科学教育部重点实验室,天津300072 [3]School of Chemical and Biomedical Engineering,Nanyang Technological University,singapore637598

出　　处：《强激光与粒子束》2011年第7期1955-1958,共4页High Power Laser and Particle Beams

摘　　要：提出了一种基于光子晶体光纤Sagnac干涉仪的横向压力传感器。使用的光子晶体光纤为低双折射光纤,首先预先在Saganc环中的光子晶体光纤上施加初始压力,使Sagnac干涉仪产生正弦干涉光谱,然后再将被测物体放在光子晶体光纤上,由于被测物体重力的作用,Saganc干涉仪输出的光谱产生移动,实现横向压力传感测量。传感器具有高灵敏度0.529 nm/(N.mm)及超低的温度系数-0.4 pm/℃,其环境温度的影响可以忽略。A lateral force sensor based on low birefringence photonic crystal fiber Sagnac interferometer is proposed.The sinusoidal interference spectrum is produced due to the initial lateral force which is pre-applied on the low birefringence fiber.The load placed on the fiber introduces extra birefringence and corresponding spectrum shift for measurement.The sensitivity achieved is 0.529 nm/（N·mm）.The property of temperature-insensitivity is verified in the experiment with the temperature coefficient of-0.4 pm/℃ which can be neglected.

关 键 词：光子晶体光纤传感器 压力传感器 SAGNAC干涉仪 低温度系数 

分 类 号：O436[机械工程—光学工程]