Ceramic materials are interesting alternative to single crystals for various optoelectronic applications including high-power
lasers and phosphors. Main advantages of ceramics compared to their single crystal counterparts are lower costs
of production, ability to incorporate higher dopant concentrations and possibility to manufacture larger elements. In the
present work, the spectroscopic properties of ceramics obtained by two different methods are compared. First method
relies on solid-state reaction of nanometric oxide powders, i.e. Al2O3, Y2O3 and Nd2O3. The oxides with addition of
tetraethyl orthosilicate were sintered under vacuum and anealled. Second method is the synthesis of neodymium-doped
aluminium garnet (Nd:YAG) nanocrystalline powders prepared by coprecipitation technique. The powders were calcined
and vacuum-sintered in optimized process conditions. For all ceramic samples fluoresce and decay data is presented.
Presented results indicate that the ceramic samples obtained by reactive sintering method have superior spectroscopic
properties compared to the samples synthesized from Nd:YAG nanocrystalline powders. The optimization of
manufacturing process allowed to demonstrate ceramics having the properties comparable to single crystal counterparts.
Optical quality and luminescent properties make the ceramics manufactured at the Institute of Electronic Materials
Technology an interesting candidate for laser applications.
The volatile character of laser beam and biological media interactions causes difficulties with respect to
prediction of eventual parameters variations of the exposed medium. Accurate evaluation of the laser energy
distribution in biological media helps to forecast the results of exposure. Together with the assumption of
predetermined absorption model it constitutes very efficacious approach of the medium thermal profile estimation
which is crucial with respect to tissue welding process [1].
Two measurement methods of selected parameters of soft tissues exposed to laser beam are presented in the paper. The results of optical detection of soft tissue coagulation and damage thresholds are shown. The same detection set-up was used for both measurements.
The paper presents a description of a construction of the ophthalmological set LH-58 with the holmium laser. Results of preliminary medical tests of eye lens curvature correction carried out by means of this set are given.
The paper presents the LL-59 set with Nd:YAG laser used for otorhinolaryngological operations. The set enables the user to apply a new treatment method in otorhinolaryngology. The interaction effects between radiation and tympanic membrane are described.
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