Highly Sensitive CH4/C2H2 Dual-Gas Light-Induced Thermoelastic Spectroscopy Sensor Based on a Dual-Path Multiring Multipass Cell and a Circle-Head Quartz Tuning Fork DOI

Haiyue Sun,

Yahui Liu, Ying He

и другие.

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

In this paper, a highly sensitive methane (CH4) and acetylene (C2H2) dual-gas light-induced thermoelastic spectroscopy (LITES) sensor based on novel dual-path multiring multipass cell (DPMR-MPC) circle-head quartz tuning fork (QTF) was demonstrated for the first time. A theoretical model established basis of double concave spherical mirrors to realize 14-interlaced-ring spot pattern in DPMR-MPC with an optical path length (OPL) 26.7 m per path. The total volume ratio (OPL/V) reached 22 cm-2. QTF low resonant frequency ∼9.5 kHz adopted enhance LITES sensor's detection ability. Raman fiber amplifier (RFA) erbium-doped (EDFA) were employed amplify two-laser excitation source. When integration time increased 100 s, minimum limits (MDLs) simultaneous CH4 C2H2 could be improved 50.9 6.64 ppb, respectively. Compared current spectroscopic techniques used detecting multiple gases, study offers obviously high sensitivity.

Язык: Английский

Fiber-optic photoacoustic sensor with SF6 purity correction for decomposition derivative H2S based on 1f and 2f dual-modes DOI
Xinyu Zhao,

H. B. Wang,

Yufu Xu

и другие.

Applied Physics Letters, Год журнала: 2025, Номер 126(17)

Опубликована: Апрель 28, 2025

A single fiber-optic photoacoustic sensor (FOPAS) is applied for the simultaneous detection of SF6 purity and decomposition derivative H2S, measurement results are corrected based on purity. H2S gas concentration identified by tracking frequency detecting signal 1f 2f, respectively. The influence resonance frequency, excitation intensity, cantilever response theoretically derived, simulated, experimentally verified. In range 80%–100%, there a linear relationship between purity, with 1.923 Hz/% minimum change limit 0.02%.The FOPAS designed T-type cell achieves 5 ppb normalized noise equivalent absorption coefficient reaches 4 × 10−10 cm−1 Hz−1/2 W. Taking 97% as an example, evaluated both before after correction. By correcting signal, accuracy improved 9%. adopting overall analysis method, high-precision high-sensitivity monitoring dual-state parameters has been achieved, providing technical support accurate early warning latent faults in gas-insulation equipment.

Язык: Английский

Процитировано

0
光声光谱技术及其生物医学检测应用（特邀） DOI
Jun Ma,

方选煜 Fang Xuanyu,

周佳成 Zhou Jiacheng

и другие.

Chinese Journal of Lasers, Год журнала: 2025, Номер 52(9), С. 0907201 - 0907201

Опубликована: Янв. 1, 2025

Процитировано

0
Highly Sensitive CH4/C2H2 Dual-Gas Light-Induced Thermoelastic Spectroscopy Sensor Based on a Dual-Path Multiring Multipass Cell and a Circle-Head Quartz Tuning Fork DOI

Haiyue Sun,

Yahui Liu, Ying He

и другие.

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

In this paper, a highly sensitive methane (CH4) and acetylene (C2H2) dual-gas light-induced thermoelastic spectroscopy (LITES) sensor based on novel dual-path multiring multipass cell (DPMR-MPC) circle-head quartz tuning fork (QTF) was demonstrated for the first time. A theoretical model established basis of double concave spherical mirrors to realize 14-interlaced-ring spot pattern in DPMR-MPC with an optical path length (OPL) 26.7 m per path. The total volume ratio (OPL/V) reached 22 cm-2. QTF low resonant frequency ∼9.5 kHz adopted enhance LITES sensor's detection ability. Raman fiber amplifier (RFA) erbium-doped (EDFA) were employed amplify two-laser excitation source. When integration time increased 100 s, minimum limits (MDLs) simultaneous CH4 C2H2 could be improved 50.9 6.64 ppb, respectively. Compared current spectroscopic techniques used detecting multiple gases, study offers obviously high sensitivity.

Язык: Английский

Процитировано

0