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IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2025-02-06 DOI:10.1007/s00340-025-08400-7

Huiling Huang, Chao Jiang, Simei Sun, Hong Li, Tingshui Cao, Long Zhang, Yukun Shu, Guozhou Jiang

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引用次数: 0

摘要

我们开发了一种可测量温度和压力的高灵敏度光纤传感器。该传感器由两个并联的法布里-珀罗干涉仪（FPI）（FPI1 和 FPI2）组成。FPI1 由单模光纤（SMF）-毛细管-SMF 拼接而成，毛细管上有一个通气孔。FPI2 由 SMF-毛细管-SMF 组成，毛细管内填充聚酰亚胺（PI）。研究发现，FPI1 对温度几乎不敏感，但对气压敏感。FPI2 对温度敏感，但对气压不敏感。当 FPI1 和 FPI2 的自由光谱范围（FSR）接近两倍关系时，它们并联形成一阶谐波游标效应（HVE）。当 HVE 传感器用于气压传感时，FPI1 为传感腔，FPI2 为参考腔。当 HVE 传感器用于温度传感时，FPI2 为传感腔，FPI1 为参考腔。实验结果表明，HVE 传感器的压力和温度灵敏度分别为 76.71 nm/MPa 和 113.29 nm/°C。这是目前文献报道的最高温度灵敏度。HVE 传感器获得的交点精度高于传统的游标效应。此外，形成 HVE 所需的 FSR 关系也更容易实现。利用 FPI1 或 FPI2 以及 HVE 传感器的温度和气压灵敏度，可以形成灵敏度测量矩阵，实现温度和气压的同时测量。

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Highly sensitive temperature and pressure fiber optic sensor based on harmonic Vernier effect

We have developed a highly sensitive fiber optic sensor that can measure temperature and pressure. The sensor comprises two Fabry–Perot interferometers (FPIs), FPI₁ and FPI₂, connected in parallel. FPI₁ is composed of single mode fiber (SMF)—capillary—SMF spliced together, with a ventilation hole on the capillary. FPI₂ is composed of SMF—capillary—SMF, and the capillary is filled with polyimide (PI). It is found that FPI₁ is almost insensitive to temperature, but sensitive to air pressure. FPI₂ is sensitive to temperature, but not sensitive to pressure. When the free spectra range (FSR) of FPI₁ and FPI₂ approaches twice the relationship, they are connected in parallel to form a first-order harmonic vernier effect (HVE). When the HVE sensor is used for air pressure sensing, FPI₁ is the sensing cavity and FPI₂ is the reference cavity. When the HVE sensor is used for temperature sensing, FPI₂ is the sensing cavity and FPI₁ is the reference cavity. The experimental results showed that the sensitivities of the pressure and temperature of the HVE sensor are 76.71 nm/MPa and 113.29 nm/ °C, respectively. This is currently the highest temperature sensitivity reported in literature. The accuracy of the obtained intersection point in HVE sensor is higher and than that of that of traditional Vernier effect. In addition, the FSR relationship required to form HVE is easier to achieve. By utilizing the temperature and air pressure sensitivities of FPI₁ or FPI₂, as well as that of the HVE sensor, a sensitivity measurement matrix can be formed to achieve simultaneous measurement of temperature and air pressure.

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.