强激光与粒子束, 2011, 23 (7): 1955, 网络出版: 2011-07-29
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 ncrystal fiber Sagnac interferometer
光子晶体光纤传感器 压力传感器 Sagnac 干涉仪 低温度系数 phonic crystal fiber sensor lateral force sensor Sagnac interferometer ultralow temperature coefficent
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。
Abstract
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.
祖鹏, 向望华, 白扬博, 金永兴. 超低温度系数的光子晶体光纤Sagnac压力传感器[J]. 强激光与粒子束, 2011, 23(7): 1955. Zu Peng, Xiang Wanghua, Bai Yangbo, Jin Yongxing. Temperature-insensitive lateral force sensor based on photonic ncrystal fiber Sagnac interferometer[J]. High Power Laser and Particle Beams, 2011, 23(7): 1955.