Patent ID: 7450788
Filing Date: 2008-11-11
Classification: G02B,G02F

Abstract:
1. An optical splitter/coupler comprising: a multimode waveguide having an electrooptic effect, and propagating multimode light; one incident waveguide propagating single mode light, and inputting the single mode light to one end of the multimode waveguide; one pair of emitting waveguides guiding-out a single mode lights which have propagated through the multimode waveguide; at least one pair of individual electrodes provided so as to be positioned in vicinities of respective side edges of the multimode waveguide, on one surface of the multimode waveguide; and a ground electrode provided on another surface of the multimode waveguide, wherein the multimode waveguide has a length such that 3(n+1) (where n is a natural number) bright spots arise at a central portion and at both side edge portions due to the single mode light incident from the incident waveguide, the individual electrodes are provided in a pair at positions corresponding to an upstream-most one pair of the bright spots, and the emitting waveguides are connected to positions corresponding to a downstream-most one pair of the bright spots at the multimode waveguide.