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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.

Technology: general issues --- History of engineering & technology --- laser flow meter --- Pitot tube --- flow speed --- time of flight --- dilution method --- flow simulation --- flow turbulence --- gas sensing applications --- MEMS --- gas sensor --- photoacoustics --- cantilever --- capacitive detection --- analytic model --- infrared imaging --- multispectral and hyperspectral imaging --- air pollution monitoring --- remote sensing and sensors --- spectroscopy --- fourier transform --- image processing --- laser gas analyzer --- flux measurement --- eddy covariance method --- derivative absorption spectroscopy --- gas sensors --- antiresonant hollow core fibers --- laser spectroscopy --- wavelength modulation spectroscopy --- tunable diode laser absorption spectroscopy --- photothermal spectroscopy --- photoacoustic spectroscopy --- fiber gas sensors --- mid-infrared --- quantum cascade detector --- high-speed operation --- heterodyne detection --- high-resolution spectroscopy --- isotopic ratio --- frequency comb --- Vernier spectroscopy --- refractometry --- pressure --- short-term performance --- Fabry–Perot cavity --- gas modulation --- modulation techniques --- metrology --- integrated sensors --- waveguides --- absorption spectroscopy --- Raman spectroscopy --- gas sensing --- femtosecond laser micromachining --- microchannel fabrication --- microstructured fibers --- photoacoustic --- pressure transducer --- wafer-level --- CO2 --- combined NIR/MIR laser absorption --- laser multiplexing in a mid-IR single-mode fiber --- simultaneous multispecies (CO, CO2, H2O) in situ measurements

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The development of solid state gas sensors based on microtransducers and nanostructured sensing materials is the key point in the design of portable measurement systems able to reach sensing and identification performance comparable with analytical ones. In such a context several efforts must be spent of course in the development of the sensing material, but also in the choice of the transducer mechanism and its structure, in the electrical characterization of the performance and in the design of suitable measurement setups. This call for papers invites researchers worldwide to report about their novel results on the most recent advances and overview in design and measurements for applications in gas sensors, along with their relevant features and technological aspects. Original research papers are welcome (but not limited) on all aspects that focus on the most recent advances in: (i) basic principles and modeling of gas and VOCs sensors; (ii) new gas sensor principles and technologies; (iii) Characterization and measurements methodologies; (iv) transduction and sampling systems; (vi) package optimization; (vi) gas sensor based systems and applications.

indium oxide --- n/a --- environmental monitoring --- semiconductor --- gas sensor --- packed gas chromatographic column --- ultrathin carbon layer --- metal-oxide-semiconductor array sensor --- halitosis --- laser ablation --- capacitive micromachined ultrasonic transducers (CMUT) --- LTCC side via --- MEMS --- indirect packaging --- gas sensing --- efficiency --- bad breath --- electrospray --- array optimization --- low temperature co-fired ceramic (LTCC) --- electronic nose --- UV irradiation --- core/shell nanostructure --- combinatorial and high-throughput technique --- sensitive material --- hydrogen sulfide --- CO detection --- ZnO --- amperometric

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

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.

Technology: general issues --- History of engineering & technology --- laser flow meter --- Pitot tube --- flow speed --- time of flight --- dilution method --- flow simulation --- flow turbulence --- gas sensing applications --- MEMS --- gas sensor --- photoacoustics --- cantilever --- capacitive detection --- analytic model --- infrared imaging --- multispectral and hyperspectral imaging --- air pollution monitoring --- remote sensing and sensors --- spectroscopy --- fourier transform --- image processing --- laser gas analyzer --- flux measurement --- eddy covariance method --- derivative absorption spectroscopy --- gas sensors --- antiresonant hollow core fibers --- laser spectroscopy --- wavelength modulation spectroscopy --- tunable diode laser absorption spectroscopy --- photothermal spectroscopy --- photoacoustic spectroscopy --- fiber gas sensors --- mid-infrared --- quantum cascade detector --- high-speed operation --- heterodyne detection --- high-resolution spectroscopy --- isotopic ratio --- frequency comb --- Vernier spectroscopy --- refractometry --- pressure --- short-term performance --- Fabry–Perot cavity --- gas modulation --- modulation techniques --- metrology --- integrated sensors --- waveguides --- absorption spectroscopy --- Raman spectroscopy --- gas sensing --- femtosecond laser micromachining --- microchannel fabrication --- microstructured fibers --- photoacoustic --- pressure transducer --- wafer-level --- CO2 --- combined NIR/MIR laser absorption --- laser multiplexing in a mid-IR single-mode fiber --- simultaneous multispecies (CO, CO2, H2O) in situ measurements --- laser flow meter --- Pitot tube --- flow speed --- time of flight --- dilution method --- flow simulation --- flow turbulence --- gas sensing applications --- MEMS --- gas sensor --- photoacoustics --- cantilever --- capacitive detection --- analytic model --- infrared imaging --- multispectral and hyperspectral imaging --- air pollution monitoring --- remote sensing and sensors --- spectroscopy --- fourier transform --- image processing --- laser gas analyzer --- flux measurement --- eddy covariance method --- derivative absorption spectroscopy --- gas sensors --- antiresonant hollow core fibers --- laser spectroscopy --- wavelength modulation spectroscopy --- tunable diode laser absorption spectroscopy --- photothermal spectroscopy --- photoacoustic spectroscopy --- fiber gas sensors --- mid-infrared --- quantum cascade detector --- high-speed operation --- heterodyne detection --- high-resolution spectroscopy --- isotopic ratio --- frequency comb --- Vernier spectroscopy --- refractometry --- pressure --- short-term performance --- Fabry–Perot cavity --- gas modulation --- modulation techniques --- metrology --- integrated sensors --- waveguides --- absorption spectroscopy --- Raman spectroscopy --- gas sensing --- femtosecond laser micromachining --- microchannel fabrication --- microstructured fibers --- photoacoustic --- pressure transducer --- wafer-level --- CO2 --- combined NIR/MIR laser absorption --- laser multiplexing in a mid-IR single-mode fiber --- simultaneous multispecies (CO, CO2, H2O) in situ measurements