材料科学
光学
游标尺
聚二甲基硅氧烷
光纤传感器
纤维
灵敏度(控制系统)
光纤
信号(编程语言)
温度测量
横截面
芯(光纤)
光电子学
复合材料
物理
结构工程
工程类
量子力学
电子工程
计算机科学
程序设计语言
作者
Yongjie Li,Dunke Lu,Jiewen Li,Shihong Huang,Xiaohui Fang
出处
期刊:Optics Express
[The Optical Society]
日期:2024-01-03
卷期号:32 (2): 1625-1625
被引量:2
摘要
Based on enhanced Vernier effect, a compact fiber sensor with ultrahigh sensitivity is proposed for simultaneous transverse load (TL) and temperature measurements. A single mode fiber (SMF) is spliced with a segment of hollow-core fiber (HCF) coated with polydimethylsiloxane (PDMS), some PDMS is injected into the HCF, forming a Vernier sensor with an air cavity adjacent to a PDMS cavity. It is shown that TL and temperature changes give rise to opposite and remarkable different variations in lengths of the two cavities, thereby enhancing Vernier effect and in favor of simultaneous measurements of TL and temperature. Moreover, the limited sensitivity magnification due to the length mismatch between the two cavities is compensated for by reconstructing the Vernier envelope with a broadened free spectrum range (FSR) from output signal. As a result, the highest TL sensitivity reported so far of −2637.47 nm/N and a good condition number of 69.056 for the sensitivity coefficient matrix have been achieved.
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