Results 281 to 290 of about 276,908 (308)
Some of the next articles are maybe not open access.
Ultrabroadband Solid-State Lasers in Trace Gas Sensing
2008Application of ultrabroadband Cr2+-doped mid-infrared lasers to sensitive molecular spectroscopy in the 2–3 μm wavelength range is demonstrated using two different techniques: scanning photoacoustic spectroscopy and intracavity absorption spectroscopy.
openaire +1 more source
Techniques to enhance the photoacoustic signal for trace gas sensing: A review
Sensors and Actuators A: Physical, 2022Fupeng Wang +8 more
semanticscholar +1 more source
Trace gas sensing using quantum cascade lasers and optoacoustic detection
SPIE Proceedings, 2009We report on the realization of a optoacoustic sensor based on mid-infrared quantum-cascade lasers (QCLs) for the detection of nitric oxide (NO) and formaldehyde (CH(2)O). A resonant photoacoustic cell equipped with 4 electret microphones was excited in its first longitudinal mode by the modulated laser light. A detection limit for of 300 parts in 10(9)
Spagnolo Vincenzo +5 more
openaire +4 more sources
Remote optical trace gas sensing over existing telecommunication access network
2016 Photonics North (PN), 2016We propose an optical remote trace gas sensing network directly overlaid onto optical access network using direct laser absorption spectroscopy (DLAS), which provides a real-time, low cost, and maintenance-free solution.
null Ting Wang +3 more
openaire +1 more source
Topical Meeting on Laser and Optical Remote Sensing: Instrumentation and Techniques, 1987
Correlation spectroscopy, which is a powerful diagnostic tool for the determination and monitoring of trace atmospheric contaminants, involves a correlative comparison between the features of a "field spectrum" of a specific region of the atmosphere, and the features of a "mask function" which is representative of the spectral absorption features of ...
W. H. Morrow, R. W. Nicholls
openaire +1 more source
Correlation spectroscopy, which is a powerful diagnostic tool for the determination and monitoring of trace atmospheric contaminants, involves a correlative comparison between the features of a "field spectrum" of a specific region of the atmosphere, and the features of a "mask function" which is representative of the spectral absorption features of ...
W. H. Morrow, R. W. Nicholls
openaire +1 more source
Environmental and industrial trace gas sensing using quantum cascade lasers
Optical Sensors and Sensing Congress (ES, FTS, HISE, Sensors), 2019Mid-IR spectroscopy using QCLs allows sensitive, selective, and fast detection of trace gases. Recent developments, including dual-wavelength QCLs, create tantalizing options for compact, multi-species analysis in industrial and environmental applications.
Lukas Emmenegger +5 more
openaire +1 more source
Photoacoustic trace gas sensing with mid-IR quantum cascade lasers
2009 3rd International Workshop on Advances in sensors and Interfaces, 2009We report on the realization of an optoacoustic sensor based on mid-infrared quantum-cascade lasers (QCLs) for the detection of nitric oxide (NO) and formaldehyde (CH(2)O). A resonant photoacoustic cell equipped with 4 electret microphones was excited in its first longitudinal mode by the modulated laser light.
Elia, A. +4 more
openaire +3 more sources
Optical and quantum electronics, 2022
Ningwu Liu, Linguang Xu, Jingsong Li
semanticscholar +1 more source
Ningwu Liu, Linguang Xu, Jingsong Li
semanticscholar +1 more source