Continuous Wave
Continuous Wave - Related Videos
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Cited by 13 •
2014
We describe the reliable generation of non-Gaussian states of traveling optical fields, including single-photon states and coherent state superpositions, using a conditional preparation method operated on the non-classical light emitted by optical parametric oscillators. Type-I and type-II phase-matched oscillators are considered and common procedures, such as the required frequency filtering or the high-efficiency quantum state characterization by homodyning, are detailed.
12:25
Peripheral Vascular Exam Using a Continuous Wave Doppler
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2015
Source: Joseph Donroe, MD, Internal Medicine and Pediatrics, Yale School of Medicine, New Haven, CT Peripheral vascular disease (PVD) is a common condition affecting older adults and includes disease of the peripheral arteries and veins. While the history and physical exam offer clues to its diagnosis, Doppler ultrasound has become a routine part of the bedside vascular examination. The video titled "The Peripheral Vascular Exam" gave a detailed review of the physical examination of the...
07:55
High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
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Cited by 7 •
2017
We describe the construction of a rapid continuous-wave-stimulated-Brillouin-scattering (CW-SBS) spectrometer. The spectrometer employs single-frequency diode-lasers and an atomic vapor notch-filter to acquire transmission spectra of turbid/non-turbid samples with high spectral-resolution at speeds up to 100-fold faster than those of existing CW-SBS spectrometers. This improvement enables high-speed Brillouin material analysis.
09:32
Standing Waves
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Standing waves, or stationary waves, are waves that appear not to propagate and are produced by the interference of two waves traveling in opposite directions with the same frequency and amplitude. These waves appear to vibrate up and down with no linear movement and are most easily identified in vibrating finite media like a plucked guitar string,...
09:36
Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
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2021
This report describes the setup, validation and verification, and results from propagation measurements using a continuous-wave, radio frequency channel-sounding measurement system.
FAQs
Stable frequency and amplitude provide a consistent energy input while the measurement proceeds. This makes the resulting signal suitable for tracking interactions such as absorption, fluorescence, scattering, or resonance under defined experimental conditions. In immunology and infection studies, that consistency supports comparisons among immune cells, microorganisms, or labeled biomolecules examined with the same optical measurement system.
The observed response depends on how the wave interacts with the material being examined. Absorption records energy uptake, fluorescence reflects emission from an appropriate labeled or responsive target, scattering reports changes in the wave’s path, and resonance indicates a condition-specific interaction. The wave type and experimental conditions determine which of these responses becomes measurable.
Experimental conditions determine how continuously supplied energy is converted into a measurable response. Changes in the wave type or the measurement setting can favor absorption, fluorescence, scattering, or resonance rather than producing the same signal in every system. Controlling those conditions is therefore important when interpreting optical findings from cells, microorganisms, or labeled biomolecules.
A continuous source can provide steady excitation during an optical assay, allowing signal collection without the interruption associated with separately delivered pulses. This supports measurements of immune cells, microorganisms, and labeled biomolecules. The resulting observations can be used to characterize cellular responses, pathogen-associated features, or molecular interactions, depending on the assay design.
The approach can be applied to optical measurements involving immune cells, microorganisms, and labeled biomolecules. Each target may produce information through a different interaction, including absorption, fluorescence, scattering, or resonance. This range makes the method relevant to studies that compare cellular behavior, examine pathogen-associated features, or assess interactions between molecules.
These measurements provide optical signals that help characterize biological features and responses rather than serving only as a source of illumination. In immunology, they can contribute to analysis of immune-cell responses. In infection research, they can help examine pathogen-associated features, while labeled biomolecule measurements can reveal information about molecular interactions under the selected experimental conditions.