Results 21 to 30 of about 84,369 (338)

Reliability Evaluation for Continuous-Wave Functional Near-Infrared Spectroscopy Systems: Comprehensive Testing from Bench Characterization to Human Test [PDF]

Sensors
In recent years, biomedical optics technology has developed rapidly. The current widespread use of biomedical optics was made possible by the invention of optical instruments.
Chenyang Gao, Jia Xiu, Chong Huang, Kaixue Ma, Ting Li   +4 more
doaj   +2 more sources

Single Source-Detector Separation Approach to Calculate Tissue Oxygen Saturation Using Continuous Wave Near-Infrared Spectroscopy

IEEE Open Journal of Engineering in Medicine and Biology, 2023
Currently, common optical techniques to measure tissue oxygen saturation (StO2) include time domain (TD), frequency domain (FD), and continuous wave (CW) near-infrared spectroscopy (NIRS).
Thien Nguyen, Soongho Park, Brian Hill, Amir H. Gandjbakhche   +3 more
doaj   +1 more source

Copper Based Site-directed Spin Labeling of Proteins for Use in Pulsed and Continuous Wave EPR Spectroscopy

Bio-Protocol, 2021
Site-directed spin labeling in conjunction with electron paramagnetic resonance (EPR) is an attractive approach to measure residue specific dynamics and point-to-point distance distributions in a biomolecule.
Kevin Singewald, James Wilkinson, Sunil Saxena   +2 more
doaj   +1 more source

Comparison of frequency-domain and continuous-wave near-infrared spectroscopy devices during the immediate transition

BMC Pediatrics, 2020
Background Non-invasive monitoring of cerebral tissue oxygen saturation (rcSO2) during transition is of growing interest. Different near-infrared spectroscopy (NIRS) techniques have been developed to measure rcSO2.
Tanja van Essen, Tom G. Goos, Liza van Ballegooijen, Gerhard Pichler, Berndt Urlesberger, Irwin K. M. Reiss, Rogier C. J. de Jonge   +6 more
doaj   +1 more source

Hybrid continuous wave terahertz spectroscopy

Optics Express, 2010
We propose a hybrid architecture for continuous wave terahertz spectroscopy employing a conventional two color photomixing system combined with a quasi time domain spectrometer, driven by a multimode laser diode. This approach fuses high spectral intensity with broadband frequency information and overcomes the ambiguity of standard continuous wave ...
Maik, Scheller, Matthias, Stecher, Marina, Gerhard, Martin, Koch   +3 more
openaire   +2 more sources

Vacuum-ultraviolet laser source for spectroscopy of trapped thorium ions

New Journal of Physics, 2023
A tunable vacuum-ultraviolet (VUV) laser source based on four-wave frequency mixing in xenon is presented. Using seed radiation from two continuous-wave lasers, the system allows for precise control of the VUV frequency and is developed for the resonant ...
J Thielking, K Zhang, J Tiedau, J Zander, G Zitzer, M V Okhapkin, E Peik   +6 more
doaj   +1 more source

Quasi-CW Pumping of a Single-Frequency Fiber Amplifier for Efficient SHG in PPLN Crystals with Reduced Thermal Load

Applied Sciences, 2021
Single-frequency lasers are essential for high-resolution spectroscopy and sensing applications as they combine high-frequency stability with low noise and high output power stability. For many of these applications, there is increasing interest in power-
Enkeleda Balliu, Magnus Engholm, Michel J. F. Digonnet, Hans-Erik Nilsson   +3 more
doaj   +1 more source

Experimental study of the potential use of diffusing wave spectroscopy to investigate the structural characteristics of blood under multiple scattering [PDF]

, 2000
The extension of the photon correlation spectroscopy (PCS) in multiple scattering regime, so-called diffusing wave spectroscopy (DWS) was employed to the study of blood samples.
Meglinski, I. V., Korolevich, Alexander N., Igor V. Meglinsky, Alexander N. Korolevich   +3 more
core   +1 more source

Measurements of Light Extinction by Single Aerosol Particles [PDF]

, 2013
A Bessel beam optical trap is combined with continuous wave cavity ringdown spectroscopy to measure the extinction cross section of individual aerosol particles.
Reid, Jonathan P., Carruthers, Antonia E., Walker, Jim S., Orr-Ewing, Andrew J.   +3 more
core   +1 more source

Polarization-Modulated Angle-Resolved Photoemission Spectroscopy: Toward Circular Dichroism without Circular Photons and Bloch Wave-function Reconstruction

Physical Review X, 2022
Angle-resolved photoemission spectroscopy (ARPES) is the most powerful technique to investigate the electronic band structure of crystalline solids. To completely characterize the electronic structure of topological materials, one needs to go beyond band
Michael Schüler, Tommaso Pincelli, Shuo Dong, Thomas P. Devereaux, Martin Wolf, Laurenz Rettig, Ralph Ernstorfer, Samuel Beaulieu   +7 more
doaj   +1 more source