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Updated: Jun 13, 2026
10:40
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Abstract:
At high frequencies (~1 GHz) acoustic attenuation severely limits the time aperture of acoustooptic deflectors (AOD). It is shown in this paper that decreasing the operating temperature of an AOD to ~4 K significantly reduces the acoustic attenuation. Due to this decrease in attenuation, at a fixed bandwidth the time-bandwidth product of an AOD is increased. Measurements are presented for a longitudinal mode tellurium dioxide AOD which demonstrate up to a factor of 10 increase in the time-bandwidth product.
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01:19Deflection of a Beam
Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
01:13Maximum Deflection
When analyzing beams under unsymmetrical loads, such as a train moving on a bridge, it is crucial to accurately determine the points of maximum stress and deflection. The process involves identifying the maximum deflection of the beam, which may not always occur at its midpoint due to the uneven distribution of the load.
The maximum deflection occurs at a specific point, known as point O, where the tangent to the deflection curve is horizontal. To find point O, the slope of the tangent at any...
The maximum deflection occurs at a specific point, known as point O, where the tangent to the deflection curve is horizontal. To find point O, the slope of the tangent at any...