Abstract
The potential of switching wavelengths by using a directional coupler has been
explored. A dual-wavelength (λ =
1300–1650 nm) directional coupler multiplexer–demultiplexer has
been realized by using the annealed-proton-exchange process in
LiNbO3. The interaction length of the coupler has been accurately
tuned to operate at a desired wavelength by annealing and reannealing the
substrate until the desired coupling length is achieved.
© 1993 Optical Society of America
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