基于中空反谐振光纤的中红外全光纤光致热弹性光谱传感器

IF 7.1 1区医学 Q1 ENGINEERING, BIOMEDICAL

Photoacoustics Pub Date : 2024-02-09 DOI:10.1016/j.pacs.2024.100594

Weipeng Chen , Shunda Qiao , Ying He , Jie Zhu , Kang Wang , Lei Qi , Sheng Zhou , Limin Xiao , Yufei Ma

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引用次数: 0

摘要

本文首次报道了一种基于中空反谐振光纤（HC-ARF）的中红外全光纤光致热弹性光谱（LITES）传感器。HC-ARF 被用作光传输介质和气室。所构建的全光纤结构具有损耗低、光学对准容易、系统稳定性好、传感器尺寸和成本降低等优点。中红外传输结构可用于瞄准最强的气体吸收线。反向锥形 SM1950 光纤和 HC-ARF 在空间上对接，两根光纤之间有一个 V 形槽，以方便气体进入。一氧化碳（CO）的吸收线在 4291.50 cm-1（2.33 µm）处，被选为验证传感性能的目标气体。实验结果表明，基于 HC-ARF 的全纤维 LITES 传感器对一氧化碳浓度具有出色的线性响应。艾伦偏差分析表明，该系统具有出色的长期稳定性。当平均检测时间为 100 秒时，最低检测限 (MDL) 为 3.85 ppm。

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Mid-infrared all-fiber light-induced thermoelastic spectroscopy sensor based on hollow-core anti-resonant fiber

In this article, a mid-infrared all-fiber light-induced thermoelastic spectroscopy (LITES) sensor based on a hollow-core anti-resonant fiber (HC-ARF) was reported for the first time. The HC-ARF was applied as a light transmission medium and gas chamber. The constructed all-fiber structure has merits of low loss, easy optical alignment, good system stability, reduced sensor size and cost. The mid-infrared transmission structure can be utilized to target the strongest gas absorption lines. The reversely-tapered SM1950 fiber and the HC-ARF were spatially butt-coupled with a V-shaped groove between the two fibers to facilitate gas entry. Carbon monoxide (CO) with an absorption line at 4291.50 cm⁻¹ (2.33 µm) was chosen as the target gas to verify the sensing performance. The experimental results showed that the all-fiber LITES sensor based on HC-ARF had an excellent linear response to CO concentration. Allan deviation analysis indicated that the system had excellent long-term stability. A minimum detection limit (MDL) of 3.85 ppm can be obtained when the average time was 100 s

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来源期刊

Photoacoustics Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

11.40

自引率

16.50%

发文量

审稿时长

53 days

期刊介绍： The open access Photoacoustics journal (PACS) aims to publish original research and review contributions in the field of photoacoustics-optoacoustics-thermoacoustics. This field utilizes acoustical and ultrasonic phenomena excited by electromagnetic radiation for the detection, visualization, and characterization of various materials and biological tissues, including living organisms. Recent advancements in laser technologies, ultrasound detection approaches, inverse theory, and fast reconstruction algorithms have greatly supported the rapid progress in this field. The unique contrast provided by molecular absorption in photoacoustic-optoacoustic-thermoacoustic methods has allowed for addressing unmet biological and medical needs such as pre-clinical research, clinical imaging of vasculature, tissue and disease physiology, drug efficacy, surgery guidance, and therapy monitoring. Applications of this field encompass a wide range of medical imaging and sensing applications, including cancer, vascular diseases, brain neurophysiology, ophthalmology, and diabetes. Moreover, photoacoustics-optoacoustics-thermoacoustics is a multidisciplinary field, with contributions from chemistry and nanotechnology, where novel materials such as biodegradable nanoparticles, organic dyes, targeted agents, theranostic probes, and genetically expressed markers are being actively developed. These advanced materials have significantly improved the signal-to-noise ratio and tissue contrast in photoacoustic methods.