A Rollar‐Type Resonant Photoacoustic Spectroscopy for Trace Gas Detection DOI Open Access
Yongjia Zhang, Guojie Wu, Zhenfeng Gong

et al.

Microwave and Optical Technology Letters, Journal Year: 2024, Volume and Issue: 66(12)

Published: Dec. 1, 2024

ABSTRACT This paper presents a miniature Rollar‐type resonant photoacoustic cell (RRPAC), consisting of two cylindrical cavities and buffer chamber. The finite element analysis the acoustic field distributions for RRPAC T‐type (TRPAC) is utilized, demonstrating that can produce greater signal than conventional TRPAC. A high sensitivity trace C 2 H spectroscopy (PAS) system successfully developed by combining cantilever beam‐based sensor as sensing unit high‐speed spectrometer demodulation with RRPAC. experimental results indicate 2f at first‐order resonance mode approximately 1.5 times TRPAC same concentration. gas detection limit PAS 40.7 ppb an averaging time 100 s. In comparison TRPAC, exhibits higher sensitivity, thus providing novel solution advancement system.

Language: Английский

Dense Multibutterfly Spots-Enhanced Miniaturized Optical Fiber Photoacoustic Gas Sensor DOI
Xinyu Zhao, Hongchao Qi, Heng Wang

et al.

Analytical Chemistry, Journal Year: 2024, Volume and Issue: 96(14), P. 5554 - 5559

Published: March 28, 2024

A miniaturized optical fiber photoacoustic gas sensor enhanced by dense multibutterfly spots is reported for the first time. The principle of space light transmission neglecting paraxial approximation theoretically analyzed designing a spots-based miniature multipass cell. In tube with diameter 16 mm, beam reflected about hundred times. on mirror surfaces at both ends form distribution. volume micro chamber only 5.3 mL. An cantilever based F–P interference utilized as pressure detector. Compared that single-pass structure, detection ability system improved 50 proposed realizes limit 3.4 ppb C2H2 an averaging time 100 s. recognized coefficients minimum detectable absorption (αmin) and normalized noise equivalent are 1.9 × 10–8 cm–1 8.4 10–10 W Hz–1/2, respectively.

Language: Английский

Citations

28
Highly sensitive laser spectroscopy sensing based on a novel four-prong quartz tuning fork DOI Creative Commons
Rui Wang, Shunda Qiao, Ying He

et al.

Opto-Electronic Advances, Journal Year: 2025, Volume and Issue: 0(0), P. 240275 - 240275

Published: Jan. 1, 2025

Language: Английский

Citations

18
Recent advances in optical fiber-based gas sensors utilizing light-induced acoustic/elastic techniques DOI Creative Commons
Yuhui Liu, Qi Yue,

Yangjian Cai

et al.

Photoacoustics, Journal Year: 2025, Volume and Issue: 43, P. 100715 - 100715

Published: April 1, 2025

Gas sensing detects gas properties, such as physical, molecular, optical, thermodynamic, and dynamic properties. Light-induced acoustic techniques include monitoring the optical physical properties of gas. Fiber-based is important because it offers several unique advantages compared to traditional technologies, high sensitivity accuracy, a compact lightweight design, remote capabilities, multiplexing, distributed sensing. We review recent developments in fiber-based sensors utilizing light-induced acoustic/elastic based on photoacoustic spectroscopy, Brillouin scattering, thermoelastic spectroscopy (LITES).

Language: Английский

Citations

0
Purification Technologies for High-Purity Quartz: From Mineralogy to Applications DOI
Lei Zhan, Qian Wang, Jiangang Ku

et al.

Separation and Purification Reviews, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 18

Published: April 20, 2025

Language: Английский

Citations

0
Ppb‐level CO2 sensor based on a miniature multipass cell with eight‐petaled spot pattern DOI

Chenglong Wang,

Leqing Lin,

Xiangyu Zeng

et al.

Microwave and Optical Technology Letters, Journal Year: 2024, Volume and Issue: 66(4)

Published: March 31, 2024

Abstract This paper presents an innovative carbon dioxide sensor leveraging a dense‐pattern multipass absorption cell. novel design dramatically compacts extensive optical path of approximately 11.4 m into 70 mm inter‐mirror distance, effectively enhancing the system's sensitivity and reducing its size. Utilizing 2004 nm diode laser, accurately targets potent CO 2 line at 4989.9 cm −1 . Experimental validation reveals remarkable linearity ( R ² = .999) detection limit 59 ppb with 1 s integration time. The incorporation Kalman filtering techniques further refines sensor's performance, to 30 ppb—a substantial improvement 49%. advancement in technology marks significant step forward efficient precise monitoring.

Language: Английский

Citations

2
A Rollar‐Type Resonant Photoacoustic Spectroscopy for Trace Gas Detection DOI Open Access
Yongjia Zhang, Guojie Wu, Zhenfeng Gong

et al.

Microwave and Optical Technology Letters, Journal Year: 2024, Volume and Issue: 66(12)

Published: Dec. 1, 2024

ABSTRACT This paper presents a miniature Rollar‐type resonant photoacoustic cell (RRPAC), consisting of two cylindrical cavities and buffer chamber. The finite element analysis the acoustic field distributions for RRPAC T‐type (TRPAC) is utilized, demonstrating that can produce greater signal than conventional TRPAC. A high sensitivity trace C 2 H spectroscopy (PAS) system successfully developed by combining cantilever beam‐based sensor as sensing unit high‐speed spectrometer demodulation with RRPAC. experimental results indicate 2f at first‐order resonance mode approximately 1.5 times TRPAC same concentration. gas detection limit PAS 40.7 ppb an averaging time 100 s. In comparison TRPAC, exhibits higher sensitivity, thus providing novel solution advancement system.

Language: Английский

Citations

0