PRODUCTION OF WAVEGUIDES MADE OF MATERIALS FROM THE KTP FAMILY

摘要

The invention relates to a method for producing waveguides (201) from a material (202) from the KTP family, said method having the following method steps: b) treating the material (202) in such a way that a periodic polarity of the material (202) is attained, c) treating the material (202) in a salt melt (309c) which contains rubidium ions, characterised in that the salt melt (309c) containing rubidium ions satisfies the following marginal conditions in step c): - the substance fraction of rubidium nitrate (RbNO₃) in the melt is in the range of 86-90 mol% at the start of the treatment; - the substance fraction of potassium nitrate (KNO₃) in the melt lies in the range of 10-12 mol% at the start of the treatment; - the substance fraction of barium nitrate (Ba(N0₃)₂) in the melt lies in the range of 0.5-1 mol% at the start of the treatment; - the temperature of the melt lies in the range of 357-363°C during the treatment. The problem that is solved is thus that of achieving substantially identical diffusion depths of the ions in the event of a reversal of the known method steps during ion exchange, so as to produce periodically poled waveguides that are free from grooves to the greatest possible extent.