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We report a new compact high power laser system using zig-zag optical path based on the cryogenic Yb:YAG total-reflection active-mirror laser for ten-kilowatts. The thermal analyses of the laser have also been discussed.
In this paper, we report femtosecond time-resolved measurements of coherent phonons in CdTe(111) crystal using transient optical reflectivity and X-ray diffraction with laser-plasma X-rays.
Our new method solves the limitation of the previous measurement system for in-plane vibration displacement, using two semiconductor lasers with adequately separated wavelengths. Different gammas, that is, interference factors, are determined for each speckle image by using lasers with different wavelengths. The ratio of the two gammas is proportional to the reciprocal of the wavelength ratio of the...
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