We show that at 1.55-μm wavelength the waveguide birefringence of ion-exchanged channel waveguides in glass can be broadly tuned by a potassium and silver double-ion exchange. Two different potassium and silver double-ion-exchange processes are used to make surface waveguides with negligible waveguide birefringence. This process is crucially important in the manufacture of devices for dense wavelength-division multiplexing systems. The dependence of the waveguide birefringence on the channel width is also reported.
© 1998 Optical Society of America
Pekka Äyräs, Gualtiero Nunzi Conti, Seppo Honkanen, and Nasser Peyghambarian, "Birefringence Control for Ion-Exchanged Channel Glass Waveguides," Appl. Opt. 37, 8400-8405 (1998)