Semiconductor optical waveguide device, optical control type optical switch, and wavelength conversion device
AssigneeKabushiki Kaisha Toshiba
InventorsNobuo Suzuki, Yuzo Hirayama
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Abstract
A semiconductor optical waveguide device comprises a stripe-shaped semiconductor optical waveguide, part of the semiconductor optical waveguide being an active layer producing gain by electric current injection, and part of the semiconductor optical waveguide being an intra-band resonant absorption layer in which an intra-band absorption resonant wavelength is arranged within the gain band of the active layer, and means for injecting electric current into the active layer.
Claims15
A semiconductor optical waveguide device comprising:
- a stripe-shaped semiconductor optical waveguide, part of said semiconductor optical waveguide being an active layer producing gain by electric current injection, and part of said semiconductor optical waveguide being an intra-band resonant absorption layer in which an intra-band absorption resonant wavelength is arranged within the gain band of said active layer;
- and
- means for injecting electric current into said active layer.
An optical control type optical switch in which at least one of destination, intensity, wavelength, and phase of a signal light output is controlled by a control light, comprising:
- a stripe-shaped semiconductor optical waveguide, part of said semiconductor optical waveguide being an active layer;
- means for inputting and outputting the signal light and the control light;
- and
- means for regulating the density of electrons and holes of the active layer so as to establish an equilibrium between loss and gain of said semiconductor optical waveguide at and near the wavelength of the signal light and the control light,
- wherein part of said semiconductor optical waveguide is made of a material having an intra-band resonant absorption at the wavelength of the control light.
An optical control type optical switch in which at least one of destination, intensity, wavelength, and phase of a signal light output is controlled by a control light, comprising:
- a stripe-shaped semiconductor optical waveguide constituting a part of optical interferometer, wherein:
- part of said semiconductor optical waveguide is an active layer, said semiconductor optical waveguide has means for regulating the density of electrons and holes of the active layer so as to establish an equilibrium between loss and gain of said semiconductor optical waveguide at and near the wavelength of the signal light and the control light, and part of said semiconductor optical waveguide is made of a material having an intra-band resonant absorption at the wavelength of the control light.
A wavelength conversion device comprising:
- a traveling wave type semiconductor laser amplifier having a semiconductor optical waveguide formed by sandwiching an active layer between a pair of clad layers, wherein light having an angular frequency different from the lights introduced into said semiconductor optical waveguide is generated by four wave mixing in said semiconductor optical waveguide,
- wherein said semiconductor optical waveguide has a semiconductor layer having an intra-band absorption resonant wavelength arranged within the gain band of said traveling wave type semiconductor laser amplifier.
Dependencies are inferred from the claim text.