基于掺铒光纤激光器的腔内 SPR 传感器研究

IF 2.1 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Journal Pub Date : 2024-10-29 DOI:10.1109/JPHOT.2024.3487973

Ge Meng;Nannan Luan;Hao He;Fan Lei;Jianfei Liu

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引用次数: 0

摘要

本文提出了一种基于掺铒光纤（EDF）激光器的腔内 SPR 传感器，以实现更高灵敏度的分析物折射率检测。首先设计了一种基于液芯光纤的 SPR 传感器，以匹配光纤激光器腔内 1530 nm 的工作波长，然后将其放入 EDF 激光器的腔内，构成全光纤腔内 SPR 传感器。我们从理论上研究了泵浦功率、腔损耗和 EDF 长度对腔内 SPR 传感器灵敏度的影响。结果表明，腔内 SPR 传感器的灵敏度可达 1.051 × 109 RIU-1（折射率单位），比无光纤激光腔 SPR 传感器的 253 RIU-1 灵敏度提高了 4 × 106 倍。此外，所提出的腔内 SPR 传感器的灵敏度可通过改变泵浦功率、腔损耗或 EDF 长度来灵活调整。这项研究表明，作为一种替代方法，光纤激光腔内光谱法与基于光纤的 SPR 传感器相结合，可以显著提高灵敏度。

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Investigation of Intra-Cavity SPR Sensor Based on Erbium-Doped Fiber Laser

In this paper, an intra-cavity SPR sensor based on erbium-doped fiber (EDF) laser is proposed to achieve higher sensitivity for detecting analyte refractive indices. A liquid-core fiber-based SPR sensor is first designed to match the operating wavelength of 1530 nm in the fiber laser intra-cavity, and then placed into the cavity of the EDF laser to constitute the all-fiber intra-cavity SPR sensor. We theoretical investigate the influence of pump power, cavity loss and EDF length on the sensitivity of the proposed intra-cavity SPR sensor. The results indicate that the sensitivity of the intra-cavity SPR sensor can reach 1.051 × 10 ⁹ RIU ⁻¹ (refractive index unit), which is enhanced 4 × 10 ⁶ times compared with the sensitivity of 253 RIU ⁻¹ obtained by the SPR sensor without fiber laser cavity. In addition, the sensitivity of the proposed intra-cavity SPR sensor can be flexibly tuned by changing pump power, cavity loss or EDF length. This work demonstrates that as an alternative approach, the combination of the fiber laser intra-cavity spectroscopy and the fiber-based SPR sensor can achieve a remarkable enhancement in sensitivity.

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来源期刊

IEEE Photonics Journal ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

4.50

自引率

8.30%

发文量

489

审稿时长

1.4 months

期刊介绍： Breakthroughs in the generation of light and in its control and utilization have given rise to the field of Photonics, a rapidly expanding area of science and technology with major technological and economic impact. Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum. IEEE Photonics Journal is an online-only journal dedicated to the rapid disclosure of top-quality peer-reviewed research at the forefront of all areas of photonics. Contributions addressing issues ranging from fundamental understanding to emerging technologies and applications are within the scope of the Journal. The Journal includes topics in: Photon sources from far infrared to X-rays, Photonics materials and engineered photonic structures, Integrated optics and optoelectronic, Ultrafast, attosecond, high field and short wavelength photonics, Biophotonics, including DNA photonics, Nanophotonics, Magnetophotonics, Fundamentals of light propagation and interaction; nonlinear effects, Optical data storage, Fiber optics and optical communications devices, systems, and technologies, Micro Opto Electro Mechanical Systems (MOEMS), Microwave photonics, Optical Sensors.