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Optical directional coupler based on Si-wire waveguides

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4 Author(s)
Yamada, H. ; Fundamental & Environ. Res. Labs., NEC Corp., Ibaraki, Japan ; Tao Chu ; Ishida, S. ; Arakawa, Y.

We fabricated optical directional couplers with Si-wire waveguides and demonstrated their fundamental characteristics. Their coupling-length was extremely short, several micrometers, because of strong optical coupling between the waveguide cores. Wavelength demultiplexing functions were also demonstrated for devices with a long coupled waveguide. Optical output from a device 800 μm long changed reciprocally with 2.5-nm wavelength spacing between the parallel and cross ports.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 3 )