光学
法布里-珀罗干涉仪
光纤
光纤传感器
材料科学
反射(计算机编程)
物理
激光器
计算机科学
程序设计语言
作者
Haibin Chen,Yao Zhang,Yang Li,Xin Jing,Suzhe Yuan,Xiongxing Zhang,Wei Wang,Liu R,Qianqiao Guo
出处
期刊:Applied Optics
[The Optical Society]
日期:2020-01-28
卷期号:59 (4): 1198-1198
被引量:5
摘要
The cavity length of short-cavity Fabry-Perot (FP) sensors cannot be effectively interrogated using the conventional peak-to-peak method if the spectrum of the exciting source is not wide enough. In this paper, we propose a squared peak-to-peak algorithm for interrogation of short-cavity fiber-optic FP sensors. By squaring the DC-filtered reflection spectrum of an FP sensor in the frequency domain, we produce an additional peak, with which the cavity length of a sensor can be estimated using the same calculations as performed with the conventional peak-to-peak method. For investigation of the feasibility of this technique, we conducted simulations and practical experiments analyzing fiber-optic FP sensors with cavity lengths in the range of 15-25 µm. The maximum error in cavity length estimated using the proposed algorithm in experiments was 0.030 µm.
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