Planar buried waveguides made by a purely thermal two-step K+ –Na+ ion exchange in soda-lime glass substrates have been investigated. Both diluted and nondiluted NaNO3 melts were used in the backdiffusion. A dramatic improvement of loss characteristics of buried waveguides has been obtained with diluted NaNO3 with different molar fractions of KNO3.
© 1993 Optical Society of America
Original Manuscript: February 18, 1993
Published: October 1, 1993
E. Mounier, G. Chartier, P. Benech, G. L. Yip, P. C. Noutsios, and R. Rimet, "Improved loss characteristics of buried waveguides," Opt. Lett. 18, 1624-1626 (1993)