Integrierbarer Modentransformator fuer optische Streifenwellenleiter

DE 10236798 A UPAB: 20040405 NOVELTY - A defined area (B) has a wave-guide core (WKK) made up of single island-shaped strips (TWK) with the same layer stack as the core of a strip transmission line (STL), the core layer stack of which is thinned in the defined area and partly replaced by the lower breaking material of the cover layer. USE - For strip transmission line optical wave-guides. ADVANTAGE - The effective refractive index dwindles in the defined area to a coupler level (K2) along with control of the mode in the wave-guide. As a result, the mode in the coupler level can be deliberately adapted to requirements, e.g. to intensity distribution in a fiber. The refraction index of the wave-guide core is greater than the refraction index of the carrier layer and the cover layer