Optical Frequency Comb Photoacoustic Spectroscopy [PDF]
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2018 Optical frequency comb photoacoustic spectroscopy (OFC-PAS) is demonstrated for the first time for broadband high-resolution trace gas analysis in small sample volumes.
Ibrahim Sadiek +4 more
openaire +8 more sources
Linearized Reconstruction for Diffuse Optical Spectroscopic Imaging [PDF]
, 2018 In this paper, we present a novel reconstruction method for diffuse optical spectroscopic imaging with a commonly used tissue model of optical absorption and scattering.
Ammari, Habib +2 more
core +2 more sources
Photonic Sensors, 2019 A trace ammonia (NH3) detection system based on the near-infrared fiber-optic cantilever-enhanced photoacoustic spectroscopy (CEPAS) is proposed. A fiber-optic extrinsic Fabry-Perot interferometer (EFPI) based cantilever microphone has been designed to ...
Min Guo +3 more
doaj +1 more source
Thermal diffusivity measurement of undoped Yb2O3 oxide by self-made photoacoustic cell
Materials Letters: X, 2023 Photoacoustic spectroscopy is an essential technique for material characterization by measuring acoustic noise inside a cell. In this work, we have fabricated a photoacoustic cell and a pre-amplifier circuit and optimized both for maximum sensitivity ...
Minarul I. Sarkar, Kaushal Kumar
doaj +1 more source
Calibration of a multi-pass photoacoustic spectrometer cell using light-absorbing aerosols [PDF]
Atmospheric Measurement Techniques, 2017 The multi-pass photoacoustic spectrometer (PAS) is an important tool for the direct measurement of light absorption by atmospheric aerosol. Accurate PAS measurements heavily rely on accurate calibration of their signal.
N. Bluvshtein +8 more
doaj +1 more source
DMD-based software-configurable spatially-offset Raman spectroscopy for spectral depth-profiling of optically turbid samples [PDF]
, 2016 Spectral depth-profiling of optically turbid samples is of high interest to a broad range of applications. We present a method for measuring spatially-offset Raman spectroscopy (SORS) over a range of length scales by incorporating a digital micro-mirror ...
Gibson, Graham +4 more
core +2 more sources
IEEE Photonics Journal, 2020 A simultaneous in-situ detection technique to obtain multi-optical parameters was proposed. The same 403.56 nm, low power, blue diode laser was used to conduct the cavity ring-down spectroscopy and photoacoustic spectroscopy, which were coupled.
Hua-Wei Jin +5 more
doaj +1 more source
A measurement strategy for non-dispersive ultra-violet detection of formaldehyde in indoor air: Spectral analysis and interferent gases [PDF]
, 2015 We have conducted an extensive review of published spectra in order to identify a region with potential for detection of formaldehyde in indoor air.
Davenport, John +3 more
core +1 more source
Photoacoustic heterodyne breath sensor for real-time measurement of human exhaled carbon monoxide
Photoacoustics, 2022 A breath sensor for real-time measurement of human exhaled carbon monoxide is reported. This breath sensor is based on a novel photoacoustic heterodyne gas sensing technique, which combines the conventional photoacoustic spectroscopy with the beat ...
Biao Li +4 more
doaj +1 more source
Enhanced photothermal displacement spectroscopy for thin-film characterization using a Fabry-Perot resonator [PDF]
, 2003 We have developed a technique for photothermal displacement spectroscopy that is potentially orders of magnitude more sensitive than conventional methods.
Black, Eric D. +3 more
core +3 more sources