Frequency division multiplexing and wavelength stabilized 2f/1f wavelength modulation spectroscopy for simultaneous trace CH4 and CO2 detection

Du, Yulong; Liu, Ningwu; Wu, Xu; Liu, Kun; Li, Jingsong

doi:10.1016/j.saa.2023.123453

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…Wavelength modulation spectroscopy was adopted to monitor the concentration change of the trace by-produces. 23,24 The key spectral characteristics related to these molecules are summarized in Table 1. 30 3 | RESULTS…”

Section: Experimental Apparatusmentioning

confidence: 99%

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Advancing CO₂ to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor

Wang,

Deng,

Huang

et al. 2024

Micro & Optical Tech Letters

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Capturing carbon dioxide (CO2) and transforming it into valuable fuels offers a dual benefit: the potential to reduce atmospheric CO2 levels and decrease our dependency on fossil fuels. Plasma‐assisted CO2 to carbon monoxide (CO) conversion stands out within the various CO2 recycling methods, with research primarily emphasizing its energy efficiency and conversion efficacy. However, investigations of CO2 conversion under real air conditions are relatively scarce, and the effects of the other atmospheric molecules on the CO2 conversion process require further exploration. We have induced plasma chemical reactions by generating ultrashort pulse laser filaments inside a sealed‐off cavity with variable air pressures. Simultaneously, we applied mid‐infrared laser absorption spectroscopy to monitor the time evolution of the reaction products. The peak CO2‐to‐CO conversion ratio was achieved at an air pressure of 8000 Pa, which resulted in a CO concentration of 82 ppm. The experimental results suggested that nitrogen (N2) plays a promoting role in CO2‐to‐CO conversion, while the presence of oxygen (O2) seems to hinder the process. The hydroxyl radical (OH) arising from water molecules (H2O) limits the accumulation of CO at lower air pressures. However, at higher air pressures, the reduced OH radical concentration shows negligible impact on the CO2‐to‐CO conversion ratios. In addition, the study revealed that atmospheric plasmas produce a high concentration of hydrogen cyanide (HCN), which is directly proportional to the levels of ambient humidity. This research contributes to the development of strategies to mitigate the production of harmful gases like HCN in CO2 conversion, thereby promoting the ecofriendly conversion of atmospheric CO2.

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Section: Experimental Apparatusmentioning

confidence: 99%

“…Toxic trace molecules like HCN can accumulate to detectable levels in a static plasma reactor over an extended period of time. High-sensitivity techniques such as wavelength modulation absorption spectroscopy 23,24 and photoacoustic spectroscopy [25][26][27][28][29] help measure trace gas concentrations efficiently.…”

Section: Introductionmentioning

confidence: 99%

Advancing CO₂ to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor

Wang,

Deng,

Huang

et al. 2024

Micro & Optical Tech Letters

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“…Ongoing research focuses on dynamic developments in DFB, BICs, and QPs planar feedback cavities, expanding their applications to sensing, imaging, optical networks, and amplifiers [229][230][231][232][233][234]. DFB lasers, for instance, find utility in gas sensing and biomedical diagnostics due to their tunable, stable, and narrow linewidth emissions [235][236][237]. More recently, Sano et al integrated multiple on-chip DFB lasers with fluorescence biomarker detection, removing the need for fiber alignment systems and allowing for complex multiplexed sensing experiments [238].…”

Section: Future Developmentsmentioning

confidence: 99%

Lasers Based on Periodic and Quasiperiodic Planar Feedback Cavities: Designs, Principle, and Potential Applications

Hayat,

Alamgir,

Jin

et al. 2024

PIER M

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Planar feedback micro-nanoscale cavities, shaped by advances in nanofabrication, have revolutionized laser technology, giving rise to chip-scale, low-threshold lasers with wide-ranging applications, spanning from atmospheric investigation to incorporation into central devices such as smartphones and computer chips. The complicated designs of these cavities, shaped by the physics of periodic and quasiperiodic structures, empower efficient manipulation of light-matter interaction and coherent light coupling, minimizing losses. This review thoroughly explores the underlying concepts and crucial parameters of planar feedback microcavities, shedding light on the photophysical behavior of recent gain materials pivotal for realizing optimal lasing properties. The examination extends to photonic crystal bandgap (PhC BG) microcavity lasers, specifically with periodic and quasiperiodic architectures. In-depth assessments probe into the principles and designs of each architecture, exploring features such as wavelength selectivity, tuneability, lasing patterns, and the narrow linewidth characteristics inherent in distributed feedback (DFB) microcavity lasers. The review highlights the intriguing characteristics of non-radiative bound states in the continuum (BIC) within periodic architectures, emphasizing trends toward high-quality factors, low thresholds, and directional and vortex beam lasing. It also explores the nascent field of Quasiperiodic (QP) microcavity lasers, addressing challenges related to disorder in traditional periodic structures. Comparative inquiries offer insights into the strengths and limitations of each architecture, while discussions on challenges and future directions aim to inspire innovation and collaboration in this dynamic field.

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A compact single-ended optical sensor for temperature measurements via laser absorption spectroscopy

Luo,

Li,

Zhao

et al. 2024

Applied Thermal Engineering

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Frequency division multiplexing and wavelength stabilized 2f/1f wavelength modulation spectroscopy for simultaneous trace CH4 and CO2 detection

Cited by 8 publications

References 31 publications

Advancing CO₂ to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor

Advancing CO₂ to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor

Lasers Based on Periodic and Quasiperiodic Planar Feedback Cavities: Designs, Principle, and Potential Applications

A compact single-ended optical sensor for temperature measurements via laser absorption spectroscopy

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Frequency division multiplexing and wavelength stabilized 2f/1f wavelength modulation spectroscopy for simultaneous trace CH4 and CO2 detection

Cited by 8 publications

References 31 publications

Advancing CO2 to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor

Advancing CO2 to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor

Lasers Based on Periodic and Quasiperiodic Planar Feedback Cavities: Designs, Principle, and Potential Applications

A compact single-ended optical sensor for temperature measurements via laser absorption spectroscopy

Contact Info

Product

Resources

About

Advancing CO₂ to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor

Advancing CO₂ to CO conversion: Detailed impact analysis of atmospheric molecules in an ultrashort pulse laser filament plasma reactor