基于偏振光纤激光器和拍频解调的相对湿度传感器

IF 4.3 2区综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Sensors Journal Pub Date : 2025-01-30 DOI:10.1109/JSEN.2025.3533483

Shiying Xiao;Jinglin Feng;Beilei Wu;Youchao Jiang;Zixiao Wang

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引用次数: 0

摘要

我们提出并演示了一种基于偏振光纤激光器和拍频解调的相对湿度（RH）传感器。该光纤激光传感器的激光腔由一对光纤布拉格光栅（fbg）和一层聚乙烯醇（PVA）薄膜层包裹的高双折射掺铒光纤（Hi-Bi EDF）组成。这种薄膜层通过膨胀或收缩来响应环境中的湿度变化，从而对EDF产生应力效应。应力效应进而导致传感系统中光电探测器检测到的偏振模拍频（PMBF）发生变化。高强度EDF固有的高双折射特性显著提高了PMBF对湿致应力的敏感性。利用该传感器进行了湿度传感实验。实验结果表明，该传感器在20.4%RH-36.0%RH的湿度范围内具有较高的平均湿度灵敏度，为13.9 MHz/%RH。稳定性测试也进行了，表明所提出的传感器达到了0.65%的相对湿度精度。

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A Relative Humidity Sensor Based on a Polarimetric Fiber Laser and Beat Frequency Demodulation

We propose and demonstrate a relative humidity (RH) sensor based on a polarimetric fiber laser and beat frequency (BF) demodulation. The laser cavity of the proposed fiber laser sensor consists of a pair of fiber Bragg gratings (FBGs) and a high-birefringence erbium-doped fiber (Hi-Bi EDF) coated by a thin polyvinyl alcohol (PVA) film layer. This thin-film layer responds to humidity changes in the environment by swelling or contracting, inducing stress effects on the EDF. The stress effect, in turn, results in changes to the polarization mode beat frequency (PMBF) detected by the photodetector (PD) in the sensing system. The inherent high-birefringence property of the Hi-Bi EDF significantly enhances the sensitivity of the PMBF to humidity-induced stress. Humidity sensing experiments are conducted utilizing the proposed sensor. Experiment results show that the sensor has a high average humidity sensitivity of 13.9 MHz/%RH within the humidity range of 20.4%RH–36.0%RH. A stability test is also conducted, demonstrating that the proposed sensor achieves an accuracy of 0.65%RH.

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来源期刊

IEEE Sensors Journal 工程技术-工程：电子与电气

CiteScore

7.70

自引率

14.00%

发文量

2058

审稿时长

5.2 months

期刊介绍： The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following: -Sensor Phenomenology, Modelling, and Evaluation -Sensor Materials, Processing, and Fabrication -Chemical and Gas Sensors -Microfluidics and Biosensors -Optical Sensors -Physical Sensors: Temperature, Mechanical, Magnetic, and others -Acoustic and Ultrasonic Sensors -Sensor Packaging -Sensor Networks -Sensor Applications -Sensor Systems: Signals, Processing, and Interfaces -Actuators and Sensor Power Systems -Sensor Signal Processing for high precision and stability (amplification, filtering, linearization, modulation/demodulation) and under harsh conditions (EMC, radiation, humidity, temperature); energy consumption/harvesting -Sensor Data Processing (soft computing with sensor data, e.g., pattern recognition, machine learning, evolutionary computation; sensor data fusion, processing of wave e.g., electromagnetic and acoustic; and non-wave, e.g., chemical, gravity, particle, thermal, radiative and non-radiative sensor data, detection, estimation and classification based on sensor data) -Sensors in Industrial Practice