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Optical Gas Sensing: Media, Mechanisms and Applications
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Optical gas sensing is one of the fastest developing research areas in laser spectroscopy. Continuous development of new coherent light sources operating especially in the Mid-IR spectral band (QCL—Quantum Cascade Lasers, ICL—Interband Cascade Lasers, OPO—Optical Parametric Oscillator, DFG—Difference Frequency Generation, optical frequency combs, etc.) stimulates new, sophisticated methods and technological solutions in this area. The development of clever techniques in gas detection based on new mechanisms of sensing (photoacoustic, photothermal, dispersion, etc.) supported by advanced applied electronics and huge progress in signal processing allows us to introduce more sensitive, broader-band and miniaturized optical sensors. Additionally, the substantial development of fast and sensitive photodetectors in MIR and FIR is of great support to progress in gas sensing. Recent material and technological progress in the development of hollow-core optical fibers allowing low-loss transmission of light in both Near- and Mid-IR has opened a new route for obtaining the low-volume, long optical paths that are so strongly required in laser-based gas sensors, leading to the development of a novel branch of laser-based gas detectors. This Special Issue summarizes the most recent progress in the development of optical sensors utilizing novel materials and laser-based gas sensing techniques.
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Keywords
- absorption spectroscopy
- air pollution monitoring
- analytic model
- antiresonant hollow core fibers
- cantilever
- capacitive detection
- CO2
- combined NIR/MIR laser absorption
- derivative absorption spectroscopy
- dilution method
- eddy covariance method
- Fabry–Perot cavity
- femtosecond laser micromachining
- fiber gas sensors
- Flow Simulation
- flow speed
- flow turbulence
- flux measurement
- fourier transform
- frequency comb
- gas modulation
- gas sensing
- gas sensing applications
- gas sensor
- gas sensors
- heterodyne detection
- high-resolution spectroscopy
- high-speed operation
- History of engineering & technology
- Image processing
- infrared imaging
- integrated sensors
- isotopic ratio
- laser flow meter
- laser gas analyzer
- laser multiplexing in a mid-IR single-mode fiber
- laser spectroscopy
- MEMS
- metrology
- microchannel fabrication
- microstructured fibers
- mid-infrared
- modulation techniques
- multispectral and hyperspectral imaging
- photoacoustic
- photoacoustic spectroscopy
- photoacoustics
- photothermal spectroscopy
- Pitot tube
- pressure
- pressure transducer
- quantum cascade detector
- Raman spectroscopy
- refractometry
- remote sensing and sensors
- short-term performance
- simultaneous multispecies (CO, CO2, H2O) in situ measurements
- spectroscopy
- Technology, engineering, agriculture
- Technology: general issues
- time of flight
- tunable diode laser absorption spectroscopy
- Vernier spectroscopy
- wafer-level
- waveguides
- wavelength modulation spectroscopy
Links
DOI: 10.3390/books978-3-0365-3480-0Editions