Water waves measured with a laser flowmeter

On Nonlinear Water Waves in a Channel

Ripplon laser through stimulated emission mediated by water waves

Lasers rely on stimulated electronic transition, a quantum phenomenon in the form of population inversion. In contrast, phonon masers1–3 depend on stimulated Raman scattering and are entirely classical. Here we extend Raman lasers1–3 to rely on capillary waves, which are unique to the liquid phase of matter and relate to the attraction between intimate fluid particles. We fabricate resonators t...

Choroidal laser Doppler flowmeter with enhanced sensitivity based on a scattering plate.

A portable choroidal laser Doppler flowmeter (LDF) with enhanced sensitivity based on a scattering plate is developed. The portable LDF is weighted 2 kg operated at center wavelength of 780 nm, leading to a better penetration into the eye fundus in contrast to the previous LDF operated at center wavelength of 670 nm. Enhancement of number of detected photons that undergo Doppler scattering and ...

Correlation of common carotid flow volume measured by ultrasonic quantitative flowmeter with pathological findings.

To evaluate the possibility of quantitatively diagnosing carotid and cerebral atherosclerosis noninvasively, we measured common carotid flow volume in 60 sides (30 patients), using an ultrasonic quantitative flowmeter, and then compared these findings to the severity score of carotid and cerebral atherosclerosis as determined at autopsy. Stenosis decreased common carotid flow volume in the caro...

Blood flow velocity during ventricular fibrillation in man measured with the Doppler flowmeter technique.

The Editorial Board is pleased to announce the appointment of Dr. Alberto Benchimol as Editor of the Department, Graphic Techniques in Cardiology. Dr. Benchimol received his M.D. degree in 1956 from the National Medical School, University of Brazil, Rio de Janeiro. His postgraduate training included fellowships at the University of Kansas Medical Center, Kansas City, and the Scripps Institute C...