用于生物温度传感的外部涂层双通道光子晶体光纤

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-11-12 DOI:10.1109/LPT.2024.3496509

Weihua Shi;Xi Cheng;Yuyan Fan;Yuying Gu

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引用次数: 0

摘要

本文提出了一种用于脱氧核糖核酸（DNA）浓度和温度的双通道传感结构。在光纤的外部涂上一层金，形成一个用于测量 DNA 浓度的表面等离子体共振 (SPR) 传感通道。最内层和中央水平层的气孔直径减小，这有利于实现核心和表面等离子体模式之间的强耦合。此外，在光纤包层内的气孔中注入甲苯，从而建立了一个专门用于温度检测的定向耦合传感通道，将温度对 DNA 浓度的影响降至最低。利用有限元法分析了传感结构的性能，并对其参数进行了相应的优化。结果表明，两个传感通道相互独立，在 DNA 浓度为 0.029~0.248 g/cm3 时，浓度灵敏度为 1.03 nm/ g $\cdot $ cm $^{mathrm {-3}}$；在温度为 0~50~^{\circ }$ C 时，浓度灵敏度为 -9.75 nm/°C。

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Externally Coated Dual-Channel Photonic Crystal Fiber for Bio-Temperature Sensing

In this letter, a dual-channel sensing structure for deoxyribonucleic acid (DNA) concentration and temperature is proposed. A gold coating is applied to the fiber’s exterior, creating a surface plasmon resonance (SPR) sensing channel for DNA concentration measurement. The diameter of the air holes in the innermost and central horizontal layers is reduced, which is conducive to achieving strong coupling between the core and surface plasmon mode. Additionally, toluene is filled into an air hole within the fiber cladding, thus establishing a directional coupled sensing channel specifically designed for temperature detection, which minimizes the effect of temperature on the concentration of DNA. The sensing structure’s performance is analyzed using the finite element method, and its parameters are optimized accordingly. The results show that the two sensing channels are independent of each other, the concentration sensitivity is 1.03 nm/ g

$\cdot $

$^{\mathrm {-3}}$

at DNA concentration ranging from 0.029 to 0.248 g/cm3, and −9.75 nm/°C at temperatures ranging from 0 to

$50~^{\circ }$

C. The proposed sensing structure offers high sensitivity for DNA concentration and temperature detection, making it applicable in biomedical and other fields.

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.