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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2005

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Investigation and modelling of rare-earth activated waveguide structures

Woliński W., Malinowski M., Mossakowska-Wyszyńska A., Piramidowicz R., Szczepański P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2005

Vol. 53, nr 2

97-102

In this paper the overview of the recent study on the rare-earth activated waveguides performed in the Optoelectronic Department of IMiO is presented. We reported on the development of rare earth-doped fluorozirconate (ZBLAN) glass fibers that allow a construction of a new family of visible and ultraviolet fiber lasers pumped by upconversion. Especially the performance of holmium devices is presented. The properties of laser planar waveguides obtained by the LPE process and the growth conditions of rare earths doped YAG layers are presented. In this paper we present also the theoretical study of the nonlinear operation of planar waveguide laser, as an example the micro disk Nd:YAG structure is discussed. We derived an approximate formula which relates the small signal gain in the Nd:YAG active medium and the laser characteristics, obtained for whispering-gallery modes and radial modes, to the output power and real parameters of the laser structure