摘要
针对传统方法测量材料热膨胀系数受外界环境因素影响较大和测试方法较为复杂,提出了一种采用微型光纤法布里-珀罗（F-P）传感器测定光纤自身以及金属Al件热膨胀系数的新方法。采用HF腐蚀光纤的方式制作F-P传感器的工艺,在30~120℃的温度范围内测得裸光纤的热膨胀系数为5.2E-8K-1,同时将F-P传感器粘贴在金属Al件上,测得金属Al的热膨胀系数为23.25E-8K-1。实验结果对比材料自身在常温下的理论值具备很高的一致性,分析了误差产生的原因。实验结果表明,微型光纤F-P传感器的制作工艺简单,测试方法稳定可靠,同时可以推广至高低温等恶劣环境下的应用。
Traditional methods to measure the thermal expansion coefficient of materials are greatly influ- enced by the external environment factors and the test methods and instruments are also eomplex. This paper proposes a new method that uses a micro fiber Fabry-Perot （F-P） sensor to measure the expan- sion coefficients of the optical fiber itself and aluminum at room temperature. This paper describes the technology in detail where the FP sensor is produced by using hydrofluoric to add the optical fiber. In a temperature range of 30 ℃ to 120 ℃ ,the thermal expansion coefficient of the fiber is measured to be 5. 2E8K-1. At the same time we paste the FP sensors on a metal aluminum,and measure the thermal ex- pansion coefficient of the metal aluminum to be 23.25E-8K-1. Experimental results fit well with the the- oretical values . Also the causes of error were analyzed. Experimental result shows that this testing method by using the micro fiber FP sensors is stable and reliable,also the production process is easy. The fiber-optic F-P sensor developed in this work is easy to fabricate and has a broad sensing application field.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2014年第11期2130-2135,共6页
Journal of Optoelectronics·Laser
基金
国家高技术研究发展计划"863"计划(2012AA041203)资助项目
关键词
光纤F-P腔
HF腐蚀
光纤传感
热膨胀系数测量
fiber FP cavity
HF acid
optical fiber sensing
thermal expansion coefficient measurement
