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Application of Continuous-Wave Cavity Ring-Down Spectroscopy to Laminar Flames [PDF]

open access: goldIEEE Photonics Journal, 2016
In this paper, we describe the application of diode-laser continuous-wave cavity ring-down spectroscopy (cw-CRDS) to in-situ flame diagnostics. Spectra of the P17e acetylene feature at 1535.4 nm were recorded in a premixed laminar ethylene/air flame. The
Gordon S. Humphries   +2 more
doaj   +6 more sources

Coherent Continuous Wave Terahertz Spectroscopy Using Hilbert Transform [PDF]

open access: yesJournal of Infrared, Millimeter, and Terahertz Waves, 2019
Coherent continuous wave (CW) terahertz spectroscopy is an extremely valuable technique that allows for the interrogation of systems that exhibit narrow resonances in the terahertz (THz) frequency range, such as high-quality (high-Q) THz whispering-gallery mode resonators.
Dominik Walter Vogt   +2 more
exaly   +4 more sources

A dynamic duo: Copper metalloregulators and continuous-wave electron spin resonance spectroscopy [PDF]

open access: yesBiophysical Reports
This review highlights the use of continuous-wave electron spin resonance (ESR) spectroscopy to investigate protein site-specific dynamics and metal coordination in bacterial copper metalloregulators.
Alysia Mandato   +2 more
doaj   +2 more sources

Operando recombination kinetics in perovskite nanocrystal films revealed by in situ time-resolved photoluminescence [PDF]

open access: yesNature Communications
Perovskite nanocrystals have shown great promise for optoelectronic applications. Understanding charge recombination under operational conditions, such as continuous-wave photoexcitation, is crucial for advancing device performance.
Dandan Cao   +5 more
doaj   +2 more sources

Performance Assessment of a Commercial Continuous-Wave Near-Infrared Spectroscopy Tissue Oximeter for Suitability for Use in an International, Multi-Center Clinical Trial

open access: yesSensors, 2021
Despite the wide range of clinical and research applications, the reliability of the absolute oxygenation measurements of continuous wave near-infrared spectroscopy sensors is often questioned, partially due to issues of standardization.
Lorenzo Cortese   +7 more
doaj   +3 more sources

A comparative study of continuous-wave versus pulsed-wave laser emission in direct laser metal deposition of SS316L thin walls [PDF]

open access: yesScientific Reports
Direct Laser Metal Deposition (DLMD), as a Directed Energy Deposition (DED) technique, can operate either continuous-wave (CW) or pulsed-wave (PW) laser emission, resulting in distinctly different thermal histories during material deposition.
Omid Mehrabi   +4 more
doaj   +2 more sources

Terahertz photonic heterodyne spectral analysis with (sub-) kHz resolution and 6.5 THz frequency coverage [PDF]

open access: yesNature Communications
Spectrum analyzers and spectrometers are essential for designing sources, analyzing material properties, layer structures and fingerprinting substances. We present an ultra-wideband, continuous-wave photonic receiver with kHz-level spectral resolution in
Benedikt Krause   +9 more
doaj   +2 more sources

Monolithic lithium niobate photonic chip for efficient terahertz-optic modulation and terahertz generation [PDF]

open access: yesNature Communications
The terahertz (THz) range, bridging microwave and infrared frequencies, enables advanced imaging, sensing, communications, and spectroscopy. Analogous to microwave photonics, terahertz photonics offers a promising optical solution to critical THz ...
Yiwen Zhang   +8 more
doaj   +2 more sources

Non-Invasive Monitoring of Human Health by Photoacoustic Spectroscopy

open access: yesSensors, 2022
For certain diseases, the continuous long-term monitoring of the physiological condition is crucial. Therefore, non-invasive monitoring methods have attracted widespread attention in health care.
Yongyong Jin   +4 more
doaj   +1 more source

Remote Sensing for Plant Water Content Monitoring: A Review

open access: yesRemote Sensing, 2021
This paper reviews the different remote sensing techniques found in the literature to monitor plant water status, allowing farmers to control the irrigation management and to avoid unnecessary periods of water shortage and a needless waste of valuable ...
Carlos Quemada   +6 more
doaj   +1 more source

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