A directional-coupler power divider by two-step K+-ion exchange is proposed and investigated experimentally after some preliminary design calculations. Coupling has been achieved with significant dimensional relaxation. Measurements were also made on the power-dividing and the extinction ratios. With a thin dielectric cladding over the coupling region, a fine tuning is feasible.
© 1984 Optical Society of America
G. L. Yip and J. Finak, "Directional-coupler power divider by two-step K+-ion exchange," Opt. Lett. 9, 423-425 (1984)