Low drive voltage directional coupler optical switch with reduced voltage-length product |
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| Authors: | Okayama H. Ushikubo T. Ishida T. |
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| Affiliation: | R&D Group, Oki Electr. Ind. Co. Ltd., Tokyo, Japan; |
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| 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 LiNbO/sub 3/ device at a 1.3 mu m wavelength.<> |
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