Optical device
AssigneeFujitsu Limited
InventorsAkira Ishii, Takehito Tanaka, Masaharu Doi, Tetsu Hasegawa
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Abstract
An optical device including (a) a substrate having an electro-optic effect; (b) a modulating optical waveguide formed on a surface layer portion of said substrate and forming an interference optical modulator for modulating input light; (c) an output optical waveguide formed on said surface layer portion of said substrate and connected to a downstream side portion of said modulating optical waveguide; and (d) a branching monitoring section for monitoring branched light of light propagated along said output optical waveguide and emitted from an outgoing end face of said substrate. The output waveguide has a reduced width region in which the waveguide width is reduced.
Claims7
The optical device, comprising:
- a substrate having an electro-optic effect;
- a modulating optical waveguide formed on a surface layer portion of said substrate and forming an interference optical modulator for modulating input light;
- an output optical waveguide formed on said surface layer portion of said substrate and connected to a downstream side portion of said modulating optical waveguide;
- and
- a branching monitoring section for monitoring branched light of light propagated along said output optical waveguide and emitted from an outgoing end face of said substrate, wherein
- said output waveguide has a reduced width region in which the waveguide width is reduced, and
- said output optical waveguide has, on the downstream side in a light propagation direction with respect to said reduced width region, an increased width region in which the waveguide width reduced in said reduced width region is increased to the original waveguide width.
The optical device, comprising:
- a substrate having an electro-optic effect;
- a modulating optical waveguide formed on a surface layer portion of said substrate and forming an interference optical modulator for modulating input light;
- an output optical waveguide formed on said surface layer portion of said substrate and connected to a downstream side portion of said modulating optical waveguide;
- and
- a branching monitoring section for monitoring branched light of light propagated along said output optical waveguide and emitted from an outgoing end face of said substrate, wherein
- said output waveguide has a reduced width region in which the waveguide width is reduced, and
- a pair of light blocking grooves for blocking the light propagated along regions of said substrate on the opposite sides of said output optical waveguide from reaching the outgoing end face are formed in the substrate regions on the opposite sides of said output optical waveguide at a position on the downstream side in the light propagation direction with respect to said reduced width region.
Dependencies are inferred from the claim text.