Results 41 to 50 of about 84,369 (338)
WIRELESS DISTRIBUTED ACQUISITION SYSTEM FOR NEAR INFRARED SPECTROSCOPY – WDA-NIRS [PDF]
Journal of Innovative Optical Health Sciences, 2013 The wireless distributed acquisition system for near infrared spectroscopy (WDA-NIRS) is a portable, ultra-compact, continuous wave (CW) NIRS system. Its main advantage is that it allows continuous synchronized multi-site hemodynamic monitoring.
J. SAFAIE +3 more
doaj +1 more source
Coherent transient spectroscopy with continuous wave quantum cascade lasers
Physical Chemistry Chemical Physics, 2013 A high power continuous wave quantum cascade laser operating around 1900 cm(-1) has been used to conduct Lamb dip spectroscopy on a low pressure sample of NO. The widths of the Lamb dips indicate that the laser linewidth is 800 ± 60 kHz and the power sufficient to induce significant population transfer of up to 35%.
Kirkbride, J +4 more
openaire +2 more sources
Optical gas sensing: a review [PDF]
, 2013 The detection and measurement of gas concentrations using the characteristic optical absorption of the gas species is important for both understanding and monitoring a variety of phenomena from industrial processes to environmental change.
Hodgkinson, Jane, Tatam, Ralph P.
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High-Frequency Modulation Spectroscopy with a THz Quantum-Cascade Laser
, 2013 A terahertz absorption spectrometer with a quantum-cascade laser (QCL) for high-resolution molecular spectroscopy is realized. The spectrometer is based on highfrequency (up to 50 MHz) modulation of the QCL frequency.
H.-W. Hubers +11 more
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Multilayer thickness determination using continuous wave THz spectroscopy
, 2022 S.696-701We present a multilayer thickness measurement system based on optoelectronic continuous wave THz spectroscopy. Due to its wide tuning range, high frequency resolution, and fast data acquisition the system combines micrometer precision with short
Stanze, D. +5 more
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Sensors, 2015 A sensitive trace gas sensor platform based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is reported. A 1.395 μm continuous wave (CW), distributed feedback pigtailed diode laser was used as the excitation source and H2O was selected as the ...
Yufei Ma +5 more
doaj +1 more source
Diamond Brillouin laser in the visible
APL Photonics, 2020 Brillouin lasers providing extremely narrow-linewidth are emerging as a powerful tool for microwave photonics, coherent communications, quantum processors, and spectroscopy.
Zhenxu Bai +7 more
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Continuous-wave stimulated Raman gain spectroscopy with cavity-ringdown detection
, 2006 Cavity ringdown (CRD) spectroscopy is extended for the first time from its conventional optical-absorption mode of operation into the regime of coherent Raman spectroscopy.
Orr, Brian J +5 more
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Homodyne Spectroscopy with Broadband Terahertz Power Detector Based on 90-nm Silicon CMOS Transistor
Applied Sciences, 2021 Over the last two decades, photomixer-based continuous wave systems developed into versatile and practical tools for terahertz (THz) spectroscopy. The high responsivity to the THz field amplitude of photomixer-based systems is predetermined by the ...
Kęstutis Ikamas +2 more
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Continuous wave and modelocked femtosecond novel bulk glass lasers operating around 2000 nm
, 2011 This thesis reports on the development of glass-based femtosecond laser sources around 2 µm wavelength. In order to be able to produce 2 µm radiation the dopants used were trivalent Thulium (Tm³⁺) and trivalent Holmium (Ho³⁺) that could be optically ...
Fusari, Flavio
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