Low-Loss glass waveguide optical power splitter by Two-Step Ion-Exchange technology

摘要

A theoretical and experiment analysis of two-step ion-exchanged glass optical power splitter is reported. In order to facilitate quantitative analysis, we propose the rational model of physics for a 1x4 S-branch power splitter in glass. These surface half-round channel waveguides are fabricated by first performing a thermal exchange in Tl_2SO_4 through a mask patterned on the glass surface. The channel waveguides are then buried by second thermal Na~+ exchange, unmasked ion exchange, in melt NaNO_3. A buried optical power splitter of low insertion loss and uniformity loss has been realized.