超低温度系数的光子晶体光纤Sagnac压力传感器

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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, 637598, Singapore

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

1.
College of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tiangjin 300072,China;
2.
Key Laboratory of Opto-Electronics Information and Technical Science of Ministry of Education,Tianjin University,Tianjjin 300072,China;
3.
School of Chemical and Biomedical Engineering,Nanyang Technological University,637598,Singapore

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。
- 光子晶体光纤传感器 /
- 压力传感器 /
- Sagnac 干涉仪 /
- 低温度系数
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.
- phonic crystal fiber sensor /
- lateral force sensor /
- sagnac interferometer /
- ultralow temperature coefficient

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