Sub-wavelength modulation of χ(2) optical nonlinearity in organic thin films
Sign Up to like & getrecommendations! Published in 2017 at "Nature Communications"
DOI: 10.1038/ncomms14269
Abstract: Modulating the second-order nonlinear optical susceptibility (χ(2)) of materials at the nanoscale represents an ongoing technological challenge for a variety of integrated frequency conversion and nonlinear nanophotonic applications. Here we exploit the large hyperpolarizability of… read more here.
Keywords: modulation optical; nonlinearity; sub wavelength; wavelength modulation ... See more keywords
Simultaneous Measurements of CO and CO2 Employing Wavelength Modulation Spectroscopy Using a Signal Averaging Technique at 1.578 μm
Sign Up to like & getrecommendations! Published in 2018 at "Applied Spectroscopy"
DOI: 10.1177/0003702818766904
Abstract: A resolved line pair was selected for simultaneous measurement of carbon monoxide (CO) and carbon dioxide (CO2) in the near-infrared (NIR) region. The spectral lines of CO and CO2 at 1.578 µm were measured by wavelength… read more here.
Keywords: modulation spectroscopy; simultaneous measurements; spectroscopy; wavelength modulation ... See more keywords
Novel method for quantitative and real-time measurements on engine combustion at varying pressure based on the wavelength modulation spectroscopy.
Sign Up to like & getrecommendations! Published in 2017 at "Optics express"
DOI: 10.1364/oe.25.00a762
Abstract: The wavelength modulation spectroscopy (WMS) technique has been demonstrated as a powerful and indispensable tool for quantitative and real-time measurements on the combustion process of various industrial devices. However, the varying pressure occurred in the… read more here.
Keywords: engine; method; wavelength modulation; varying pressure ... See more keywords
Parameter-tuning stochastic resonance as a tool to enhance wavelength modulation spectroscopy using a dense overlapped spot pattern multi-pass cell.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.465629
Abstract: The parameter-tuning stochastic resonance (SR) method can convert part of the noise energy into the signal energy to suppress the noise and amplify the signal, comparing with traditional weak periodic signal detection methods (e.g., time… read more here.
Keywords: wavelength modulation; parameter tuning; spectroscopy; stochastic resonance ... See more keywords
Wavelength modulation laser heterodyne radiometry.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.003009
Abstract: A novel method is proposed for improving the performance of traditional laser heterodyne radiometry. The technique, which is based on the use of a wavelength modulated local oscillator laser, provides baseline-free spectra, lower limits of… read more here.
Keywords: laser heterodyne; heterodyne radiometry; laser; wavelength modulation ... See more keywords
High-sensitivity off-axis integrated cavity output spectroscopy implementing wavelength modulation and white noise perturbation.
Sign Up to like & getrecommendations! Published in 2019 at "Optics letters"
DOI: 10.1364/ol.44.003298
Abstract: In this Letter, a new method is proposed to further improve the detection sensitivity of the gas sensor based on off-axis integrated cavity spectroscopy (OA-ICOS) using a distributed feedback laser operating in the near-infrared at… read more here.
Keywords: axis integrated; noise perturbation; spectroscopy; integrated cavity ... See more keywords
High Sensitivity Continuous Monitoring of Chloroform Gas by Using Wavelength Modulation Photoacoustic Spectroscopy in the Near-Infrared Range
Sign Up to like & getrecommendations! Published in 2021 at "Applied Sciences"
DOI: 10.3390/app11156992
Abstract: An optical system for gaseous chloroform (CHCl3) detection based on wavelength modulation photoacoustic spectroscopy (WMPAS) is proposed for the first time by using a distributed feedback (DFB) laser with a center wavelength of 1683 nm… read more here.
Keywords: chloroform gas; wavelength modulation; sensitivity; spectroscopy ... See more keywords