Results 11 to 20 of about 272,217 (266)

Entanglement-Assisted Absorption Spectroscopy [PDF]

open access: yesPhysical Review Letters, 2020
We propose a practical transmitter-receiver system that exploits entanglement to achieve a provable quantum advantage over all spectrometers based on classical sources. The quantum advantage is robust against noise and loss.
Shi, Haowei   +3 more
openaire   +5 more sources

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

open access: yesSensors, 2021
On-chip devices for absorption spectroscopy and Raman spectroscopy have been developing rapidly in the last few years, triggered by the growing availability of compact and affordable tunable lasers, detectors, and on-chip spectrometers.
Sebastián Alberti   +2 more
doaj   +1 more source

Optical Characterization of Ciprofloxacin Photolytic Degradation by UV-Pulsed Laser Radiation

open access: yesMolecules, 2021
Ciprofloxacin is one of the most prescribed antibiotics in treating bacterial infections, becoming an important pollutant of the wastewaters. Moreover, ciprofloxacin is hard to be destroyed by conventional water treatment processes; therefore, efficient ...
Tatiana Tozar   +3 more
doaj   +1 more source

Long-Term Stable Online Acetylene Detection by a CEAS System with Suppression of Cavity Length Drift

open access: yesSensors, 2019
A trace acetylene (C2H2) detection system was demonstrated using the cavity-enhanced absorption spectroscopy (CEAS) technique and a near-infrared distributed feedback (NIR-DFB) laser.
Qixin He, Qibo Feng, Jiakun Li
doaj   +1 more source

Reduction of optical noise in near-infrared range laser hygrometry [PDF]

open access: yesMetrology and Measurement Systems, 2023
A contactless laser hygrometer based on light absorption by H2O molecules at 1392.5 nm is described. However, measurement results can be affected by optical noise when applied to an atmospheric tunnel or glass cuvette.
Tadeusz Stacewicz   +2 more
doaj   +1 more source

Ultrasensitive Absorption Spectroscopy

open access: yesPhysics, 2011
Absorption spectroscopy limited only by quantum noise has been demonstrated over a broad frequency range using laser frequency combs.
Mandon, J.B., Harren, F.
openaire   +3 more sources

Calibration-Free WMS Using a cw-DFB-QCL, a VCSEL, and an Edge-Emitting DFB Laser With In-Situ Real-Time Laser Parameter Characterization

open access: yesIEEE Photonics Journal, 2017
This paper presents a detailed experimental wavelength modulation spectroscopy approach and demonstrates its applicability to various types of semiconductor lasers in the near infrared and mid-infrared.
Abhishek Upadhyay   +5 more
doaj   +1 more source

TDLAS Monitoring of Carbon Dioxide with Temperature Compensation in Power Plant Exhausts

open access: yesApplied Sciences, 2019
Temperature variations of flue gas have an effect on carbon dioxide (CO2) emissions monitoring. This paper demonstrates accurate CO2 concentration measurement using tunable diode laser absorption spectroscopy (TDLAS) with temperature compensation methods.
Xiaorui Zhu   +4 more
doaj   +1 more source

Relic neutrino absorption spectroscopy [PDF]

open access: yesPhysical Review D, 2004
19 pages, 26 figures, REVTeX ...
Eberle, Birgit   +3 more
openaire   +3 more sources

X-ray absorption spectroscopy [PDF]

open access: yesPhotosynthesis Research, 2009
This review gives a brief description of the theory and application of X-ray absorption spectroscopy, both X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), especially, pertaining to photosynthesis. The advantages and limitations of the methods are discussed.
Yano, Junko, Yachandra, Vittal K.
openaire   +4 more sources

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