Abstract:
Various embodiments provide an apparatus and a method for operating the apparatus. The apparatus, in one embodiment, may include an optical waveguide located over a substrate, the optical waveguide having a first segment and a second segment. The apparatus may further include a single heating element configured to heat both the first segment and the second segment, wherein a light propagation direction at a point in the second segment differs by at least 90 degrees with respect to a light propagation direction at the point in the first segment.
Abstract:
The invention relates to an optical device which can increase the spread of a beam diameter in the depthwise direction by a simple configuration in comparison with that by prior art devices. The optical device includes a substrate, an optical path formed on the substrate, and a diffraction propagation region, provided between the optical path and an end face of the substrate, for propagating light emitted from the optical path with diffraction. The diffraction propagation region includes a first groove, formed therein, adapted to block part of components of the propagated light in a depthwise direction of the substrate.
Abstract:
A non-volatile programmable electro-optical element alters absorption characteristics of an optical medium that comprises a transition metal oxide material by electrostatically moving oxygen vacancies into or out of the regions containing a wavefunction of an optical beam. A specific oxygen vacancy profile in the transition metal oxide material may be programmed into the optical medium. The oxygen vacancy profile alters an absorption profile within the optical medium. Once the absorption profile is set by an electrical signal, the optical element maintains its state even when the electrical signal is turned off. Thus, the programming node may be disconnected from a power supply network, thereby enabling a low power operation of the electro-optical element. Amorphous transition-metal oxides enable integration into back-end-of-line (BEOL) interconnect structures and do not have birefringence. The inventive electro-optical element may be employed for both the visible and the infrared wavelength spectrum.
Abstract:
An optical device includes: a substrate side waveguide formed on a substrate; and a plurality of optical elements fixed on the substrate. The substrate side waveguide and an optical element side waveguide formed in each of the plurality of optical elements forms a continuous optical waveguide path.
Abstract:
The present invention provides an optical waveguide device having a configuration such that the optical waveguide is folded back on an end area of the optical waveguide substrate to widen the modulation band. The optical waveguide device 1A includes a substrate body 2 made of an electro-optical material, optical waveguide 6, and modulation electrodes 3, 4 and 5 for applying a voltage on the optical waveguide 6. The optical waveguide 6 includes first primary areas 6e and 6f, a first curved area 7A, first folding-back areas 6g and 6h provided between the first curved area 7A and a folding-back point 8, second primary areas 6m and 6n, a second curved area 7B, and second folding-back areas 6j and 6k provided between the second curved area 7B and the folding-back point 8. At least a part of the signal electrode is provided in a folding-back region extending from the first curved area 7A and the second curved area 7B to the folding-back point 8.
Abstract:
An optical device includes: a substrate side waveguide formed on a substrate; and a plurality of optical elements fixed on the substrate. The substrate side waveguide and an optical element side waveguide formed in each of the plurality of optical elements forms a continuous optical waveguide path.
Abstract:
It is provided an optical waveguide device in which the radius of curvature of a curved part of an optical waveguide can be lowered and the radiation loss of light in the curved part can be reduced. An optical waveguide device 2 has a ferroelectric optical waveguide substrate and an optical waveguide 5 formed in or on the substrate and modulating electrodes 4A, 4B and 4C. The thickness of the optical waveguide substrate is 30 μm or smaller at least in a region where the optical waveguide is formed. The optical waveguide has curved part having a radius of curvature of 30 mm or smaller.
Abstract:
An integrated electro-optic module may contain a continuous layer of electro-optic polymer through both a splitter portion and a modulator portion in order to facilitate high speed data transmission. The integrated electro-optic module may be fabricated by depositing a bottom cladding layer on a wafer, creating side cladding features, depositing the electro-optic polymer, and coating with a top cladding layer. The electro-optic polymer in both the splitter portion and modulator portion of the integrated electro-optic module may create inverted-ridge waveguide structures. The waveguide in the splitter portion may have a first ridge depth, and the waveguide in the modulator portion may have a second ridge depth, the first ridge depth greater than the second ridge depth.
Abstract:
Optical modulator devices exhibiting improved response characteristics are constructed from a ring resonator having a tunable loss element positioned within the ring resonator structure and one or more phase shifters. By tuning and/or controlling the loss within the resonator, desired modulator response characteristics are obtained.
Abstract:
An optical waveguide has a diffusion area (optical waveguide) with a high refractive index formed by diffusing impurities on a substrate. The diffusion area has a bent portion, and the optical waveguide includes: a groove formed by cutting the substrate along the diffusion area on the outside of the bent portion of the diffusion area; and a first buffer layer disposed on the upper portion of the diffusion area, having a refractive index equal to or higher than the refractive index of the substrate. The optical waveguide includes a second buffer layer having a refractive index equal to or lower than the refractive index of the substrate on the upper portion of the first buffer layer, and the second buffer layer is formed including contact with a side face of the groove.