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膜片式微型F-P腔光纤压力传感器

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Indexed by:期刊论文

Date of Publication:2009-12-15

Journal:光学精密工程

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Volume:17

Issue:12

Page Number:2887-2892

ISSN No.:1004-924X

Key Words:光纤Fabry-Perot腔;微型压力传感器;石英膜片;聚合物膜片

Abstract:为满足工业和生物医学领域对微型化传感器的需求,实验研究了基于Fabry-Perot(F-P)干涉仪原理的膜片式微型光纤压力传感器的制作工艺.在单模光纤端面上直接熔接外径约175 μm的毛细石英管,在石英管的另一端制作敏感膜片,从而使光纤端面与膜片内表面之间形成F-P干涉腔.采用电弧熔接、切割、腐蚀膜片等方法制作了石英膜片式压力传感器,该传感器在0~3.1 MPa内F-P腔的腔长变化灵敏度为41.09 nm/MPa,压强测量分辨率为681 Pa,并具有很小的温度敏感系数.在30~140 ℃,温度交差敏感<1.07 kPa/℃.为了克服石英膜片减薄困难的缺点,选用聚合物材料(PSQ)作为压力敏感膜片制作了F-P传感器.室温下在0.1~2.1 MPa,PSQ膜片的F-P腔长变化灵敏度达到1 886.85 nm/MPa,压强测量分辨率达到53 Pa,十分接近人类或其他动物的体内压强测量水平.

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