Optical waveguides – With optical coupler – Particular coupling structure
Patent
1991-03-25
1992-09-08
Healy, Brian
Optical waveguides
With optical coupler
Particular coupling structure
385 30, 385 14, 385 11, G02B 610
Patent
active
051465183
ABSTRACT:
There is provided an optical functional device having a coupling portion in which two optical waveguides formed of semiconductor material are evanescent-coupled to each other and arranged in parallel and comprising voltage application electrodes electrically connected to each other and disposed on an upstream side portion of one of the two optical waveguides and a downstream side portion of the other optical waveguide and current injection electrodes electrically connected to each other, disposed on an downstream side portion of the former one of the two optical waveguides and an upstream side portion of the other optical waveguide and electrically isolated from the voltage application electrodes; wherein N-stage (N is an integer larger than 2) electrodes of reversal .DELTA..beta. structure are continuously disposed in the optical waveguide, first electrodes electrically connected to each other are disposed on the upsteam side portion of one of the two optical waveguides and the downstream side portion of the other optical waveguide between an Mth (M is an integer which satisfies the relation that 1.ltoreq.M.ltoreq.N-1) stage electrode and an (M+1)th stage electrode and second electrodes which are electrically connected to each other but are electrically separated from the first electrodes are disposed on the downstream side portion of the former one of the two optical waveguides and the upsteam side portion of the other optical waveguide. The optical functional device can be operated as an optical splitter or polarization switch by combining the current injection operation and the voltage application operation with respect to the electrodes.
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Mak Hon-Ming
Yanagawa Hisaharu
Healy Brian
The Furukawa Electric Co. Ltd.
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