Haiyue Sun , Ying He , Shunda Qiao , Chu Zhang , Yufei Ma
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引用次数: 0
Abstract
This paper presented a highly sensitive light-induced thermoelastic spectroscopy (LITES) sensor for detecting hydrogen sulfide (H₂S) gas. Optical path multiplexing (OPM) technology was implemented within the fiber-coupled multi-pass cell (MPC) to realize ∼ 80 m gas absorption optical path length (OPL), compensating the weak absorption coefficient of H2S in the near-infrared band. A circle-head quartz tuning fork (QTF) with resonant frequency of ∼ 9.5 kHz was adopted in the H₂S-LITES sensor to enhance the energy accumulation time and the detection ability. Compared with commercial QTF, signal-to-noise ratio (SNR) based on circle-head QTF was improved by a factor of 3.36 times. Minimum detection limit (MDL) for H2S detection was measured to be 238.8 ppb. When the integration time of the system was increased to 250 s, the MDL could be improved to 19.8 ppb.
PhotoacousticsPhysics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
11.40
自引率
16.50%
发文量
96
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.
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