Abstract:
L'invention concerne un procédé de fabrication d'un modulateur électro-optique latéral sur un substrat SOI, le modulateur comprenant un guide d'onde en arête formé dans la couche mince de silicium du substrat SOI, le guide d'onde en arête étant placé entre une région dopée P et une région dopée N formées dans la couche mince de silicium, le guide d'onde en arête occupant une région intrinsèque de la couche mince, au moins une zone dopée P étant formée dans l'arête et perpendiculairement au substrat. Le procédé comprend des étapes de masquage de la couche mince de silicium pour y définir l'arête du guide d'onde, de gravure de l'arête, de masquage de la couche mince de silicium pour délimiter les parties à doper P, de dopage des parties à doper P, de masquage de la couche mince de silicium pour délimiter la région à doper N et de dopage de la région à doper N. Les étapes de masquage mettent en ouvre un masque dur dont le motif permet de définir l'arête du guide d'onde, la zone à doper P dans l'arête du guide d'onde et la limite de la région dopée N par rapport à l'arête du guide d'onde.
Abstract:
It is an object to provide an optical control device capable of realizing speed matching between a microwave and a light wave or impedance matching of microwaves and of reducing a driving voltage. An optical control device including a thin plate 1 (11) which has an electro-optical effect and has a thickness of 10 µm or less, an optical waveguide 2, formed in the thin plate, and control electrodes for controlling light passing through the optical waveguide is characterized in that the control electrodes are configured to include a first electrode and a second electrode disposed to interpose the thin plate therebetween, the first electrode has a coplanar type electrode including at least a signal electrode 4 and a ground electrode 5, and the second electrode has at least a ground electrode 54 (55, 56) and is configured to apply an electric field to the optical waveguide in cooperation with the signal electrode of the first electrode.
Abstract:
A waveguide type optical isolator comprises a substrate, a waveguiding layer provided with waveguides, a magnetic garnet, magnetic field applying means, and a package substrate, wherein a first magnet and a second magnet is provided as the magnetic field applying means, and the first magnet and the second magnet are housed and fixed within a magnet holder.
Abstract:
An optical waveguide is formed on a substrate and includes a curved ridge structure, a curved optical path, and a buffer layer. The curved ridge structure is formed on the substrate so as to have a curvature in a longitudinal direction of the curved ridge structure. The curved optical path is formed along the curved ridge structure. The buffer layer covers a side of the ridge structure and has a lower refractive index than a refractive index of the substrate.
Abstract:
An opto-electronic device (1) comprising a directional coupler (11) provided with a first waveguide (1) to receive incoming electromagnetic radiation, said first guide comprising a guiding region (3) of electro-optic material. Moreover, the directional coupler comprises a second waveguide (2) into which can be coupled at least a first portion of said incoming radiation and provided with a port for radiation being output. The opto-electronic device is equipped with a structure for generating (12, 13) a controlling electric field (ERF) at least inside said first guide (1) of the directional coupler and such as to cause in said electro-optic material polarization conversion of at least part of said incoming radiation. By means of this polarization conversion it is possible to control the power of the radiation being output from the second waveguide, producing a modulator, a changeover switch, an attenuator or an open-or-closed switch.
Abstract:
An optical waveguide (1) is formed on a substrate (2) and includes a curved ridge structure (3), a curved optical path, and a buffer layer. The curved ridge structure is formed on the substrate so as to have a curvature in a longitudinal direction of the curved ridge structure. The curved optical path is formed along the curved ridge structure. The buffer layer (4) covers a side of the ridge structure and has a lower refractive index than a refractive index of the substrate.
Abstract:
Two grooves 10 are diced in parallel along the light passage direction in a quartz quasi-phase matching element 1. Consequently, as is shown in (b) and (c), a protruding part 11 which is positioned between the two grooves 10 is formed on the upper surface side (in the figures), and a ridge type waveguide 9 is formed inside this protruding part. Accordingly, if light is caused to pass through this ridge type waveguide 9, the light can be caused to pass through the portions with inverted crystal axes (polarization inversion regions) 4, and can be subjected to a wavelength conversion, in a state in which the light is confined into the ridge type wavelength guide 9. As a result, a state can be produced in which the energy of the light is high inside the wavelength conversion region, so that a high wavelength conversion efficiency can be obtained.
Abstract:
An optical waveguide (1) is formed on a substrate (2) and includes a curved ridge structure (3), a curved optical path, and a buffer layer. The curved ridge structure is formed on the substrate so as to have a curvature in a longitudinal direction of the curved ridge structure. The curved optical path is formed along the curved ridge structure. The buffer layer (4) covers a side of the ridge structure and has a lower refractive index than a refractive index of the substrate.