%0 Journal Article %T Diagnostic Methods for Planar Optical Waveguides %A J. Ctyroky %A J. Janta %A M. Skalsky %A J. Schrofel %J Radioengineering %D 1994 %I Spolecnost pro radioelektronicke inzenyrstvi %X Basic diagnostic methods for examining planar optical waveguides, namely the mode spectroscopy for determining the propagation constants of waveguide modes and two methods for measurement of attenuation coefficient of a waveguide or loss in some waveguide components, are presented. A promising advanced method ¡é ? ¡± optical coherence-domain reflectometry ¡é ? ¡± is briefly mentioned. %U www.radioeng.cz/fulltexts/1994/94_04_02.pdf