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National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Příprava optických vlnovodů ve speciálně navržených Er- a Yb- dotovaných silikátových sklech iontovou výměnou Ag.sup.+./sup./Na.sup.+./sup
 Salavcová, Linda ; Ondráček, František ; Míka, M. ; Špirková, J.
Modification of the Ag.sup.+./sup./Na.sup.+./sup. exchange conditions was done in order to decrease optical losses and to modify n(x) profile of the waveguides. This was achieved using reaction melt with decreased Ag.sup.+./sup. content and consequent annealing of the samples.
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Tuned semiconductor laser for the diagnostic of the channel waveguides
 Ondráček, František ; Skalský, Miroslav ; Čtyroký, Jiří
In contribution is described new measuring set up with tuned semiconductor laser and there are given first results of spectral losses and group refractive index in various channel waveguides by using a resonator method. The waveguides were prepared in special glasses by ion exchanges method and in LiNbO.sub.3./sub. crystal by proton exchange and also by titan difusion. Experimental results have demonstrated accuracy and rate of this arangement. In conclusion we have shown the possibility of the next research.
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ECIO'03 Prague. Proceedings of the 11th European Conference on Integrated Optics Prague
 Čtyroký, Jiří ; Hubálek, Milan ; Ondráček, František
Proceedings from the 11th Europaen Conference on Integrated Optics ECIO'03 held in Praque on 2-4 April 2003 bringsa full texts of most of invited lectures and tutorials and 92 contributed papers that were accepted for presentation after a thorough review procedure.
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Diagnostic of vertically coupled microring resonator
 Ondráček, František ; Čtyroký, Jiří ; Skalský, Miroslav
A vertically coupled microring resonator based on Si.sub.3./sub.N.sub.4./sub.-SiO.sub.2./sub. technology was characterized by a tunable sem iconductor laser. The drop spectral responses were measured and resonator finesse, free spectral range and group effective index were determined.
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