Mach-Zehnder interferometer temperature sensor based on misaligned optical fiber coated with SU-8 photoresist

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik Pub Date : 2025-06-04 DOI:10.1016/j.ijleo.2025.172441

Aimin Cong, Yuxin Zheng, Jie Yang, Bowen Yu, Min Li

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引用次数: 0

Abstract

In this paper, a Mach-Zehnder fiber-optic temperature sensor based on core-offset is proposed. The sensor is prepared using fiber-optic splicing technology and UV curing technology, and the fabrication process is simple. First, the impact of the fiber offset-spliced length and offset-spliced size on spectral quality is studied. Second, the fiber structure with the offset-spliced size of 42 μm and the offset-spliced length of approximately 700 μm is further investigated. The SU-8 photoresist with high thermal expansion coefficient and high thermo-optical coefficient is coated with the offset-spliced area. Finally, a fiber Mach-Zehnder temperature sensor is obtained. Within the temperature range of 30 ℃ to 60 ℃, the temperature characteristics are investigated. The fast Fourier transform is done, and the wavelengths of the interference peak near 1300 nm is measured. Experimental results show that the sensitivity of the proposed sensor reaches 0.72096 nm/℃. Moreover, SU-8 has good acid and alkali resistance, making the proposed fiber-optic temperature sensor promising for applications in biomedicine, chemistry and other fields.

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基于SU-8光刻胶包覆错位光纤的Mach-Zehnder干涉仪温度传感器

本文提出了一种基于芯偏置的Mach-Zehnder光纤温度传感器。该传感器采用光纤拼接技术和UV固化技术制备，制作工艺简单。首先，研究了光纤偏接长度和偏接尺寸对光谱质量的影响。其次，进一步研究了偏接尺寸为42 μm、偏接长度约为700 μm的光纤结构。采用偏置拼接区对具有高热膨胀系数和高热光学系数的SU-8光刻胶进行涂覆。最后，得到了一种光纤马赫-曾德尔温度传感器。在30 ~ 60℃的温度范围内，对其温度特性进行了研究。进行了快速傅里叶变换，测量了1300 nm附近干涉峰的波长。实验结果表明，该传感器的灵敏度可达0.72096 nm/℃。此外，SU-8具有良好的耐酸碱性能，使得所提出的光纤温度传感器在生物医学、化学等领域具有广阔的应用前景。

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.