State-of-the-art Laser Gas Sensing Technologies

• Main Author: Krzempek, Karol (auth)
• Other Authors: Ma, Yufei (auth), Vicet, Aurore (auth)
• Format: Electronic Book Chapter
• Language: English
• Published: MDPI - Multidisciplinary Digital Publishing Institute 2020
• Subjects: History of engineering & technology; methane detection; concentration prediction; two-photon femtosecond laser-induced fluorescence; n/a; finite-element analysis; wavelength modulation spectroscopy (WMS); quartz-enhanced photoacoustic spectroscopy; real-time observation; carbon dioxide monitoring; filament-induced nonlinear spectroscopy; thermal control; femtosecond laser-induced plasma spectroscopy; Tm; MgO:PPLN crystal; mid-infrared ICL; combustion sensing; algorithm; laser absorption spectroscopy (LAS); mid-infrared fingerprint spectrum; time division multiplexing differential modulation; detection limit; design optimization; 13CO2/12CO2 isotope ratio detection; femtosecond laser-induced breakdown spectroscopy; coupling efficiency; gas detection; laser spectroscopy; hollow-core photonic crystal fiber; thermoelectric cooling; TDLAS; chicken swarm optimization; frequency modulation spectroscopy; absorption spectroscopy; practical applications; methane; wavelength modulation spectroscopy; continuous-wave (CW); tunable laser absorption spectroscopy; noise reduction algorithms; C2H2 detection; a multi-reflection chamber; tunable mid-infrared solid-state laser; photothermal spectroscopy; stokes vectors; combustion diagnostic; GRIN fiber probe; wavelength modulation; deep-sea natural gas hydrate exploration; femtosecond laser electronic excitation tagging; graphene saturable absorber; femtosecond laser; near-infrared; all-fiber laser; optical parametric oscillator; mid-infrared; gas sensing; direct absorption spectroscopy (DAS); interferometric gas detection; single-frequency; non-linearity; TDLAS technique; interband cascade lasers; optical parametric oscillator (OPO); quantum cascade lasers; PQS; support vector machine; Ho:LuVO4 laser; two-tone frequency modulation spectroscopy; intracavity gas detection; quartz tuning fork; trace gas detection; information processing technology; optical sensing; temperature compensation; broadband spectrum; tunable diode laser; diffuse integrating cavity
• Online Access: DOAB: download the publication; DOAB: description of the publication

Trace gas sensing technologies are widely used in many applications, such as environmental monitoring, life science, medical diagnostics, and planetary exploration. On the one hand, laser sources have developed greatly due to the rapid development of laser media and laser techniques in recent years. Some novel lasers such as solid-state, diode, and quantum cascade lasers have experienced significant progress. At present, laser wavelengths can cover the range from ultraviolet to terahertz, which could promote the development of laser gas sensing technologies significantly. On the other hand, some new gas sensing methods have appeared, such as photothermal spectroscopy and photoacoustic spectroscopy. Laser spectroscopy-based gas sensing techniques have the advantages of high sensitivity, non-invasiveness, and allowing in situ, real-time observation. Due to the rapid and recent developments in laser source as well as the great merits of laser spectroscopy-based gas sensing techniques, this book aims to provide an updated overview of the state-of-the-art laser gas sensing technologies.