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Spatially resolved positron annihilation spectroscopy on friction stir weld induced defects
Spatially resolved positron annihilation spectroscopy friction stir weld induced defects
2010/10/12
A friction stir welded (FSW) Al alloy sample was investigated by Doppler broadening spectroscopy (DBS) of the positron annihilation line. The spatially resolved defect distribution showed that the mat...
Application of spatially resolved thermoreflectance for the study of facet heating in high power semiconductor lasers
thermoreflectance
2011/5/3
We have developed a new technique for monitoring the facet heating in semiconductor lasers and for correlating these measurements with the performance and reliability of the device. The method is base...
Analysis of mounting induced strain in semiconductor structures by means of spatially resolved optical modulation techniques
electroreflectance mounting induced strain laser bar
2011/4/27
A wide range of applications of high-power diode lasers is connected with the tendency towards device miniaturization resulting in increased power densities. To manage the thermal load, the chips or a...