Title :
Low drive voltage directional coupler optical switch with reduced voltage-length product
Author :
Okayama, Hideaki ; Ushikubo, Takashi ; Ishida, Tomoyuki
Author_Institution :
R&D Group, Oki Electr. Ind. Co. Ltd., Tokyo, Japan
fDate :
3/15/1990 12:00:00 AM
Abstract :
The phase change*interaction length product needed to switch a directional coupler is shown to be reduced by decreasing the coupling coefficient at the middle of the interaction region. With this improved structure, a voltage-interaction length product of 3.6 V cm was achieved with a LiNbO3 device at a 1.3 mu m wavelength.
Keywords :
directional couplers; electro-optical devices; lithium compounds; optical couplers; optical switches; 1.3 micron; LiNbO 3; directional coupler; low voltage drive; optical switch; optical waveguides; voltage-interaction length product;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900244
