Abstract:
An electro-optical filter made of a support in which an optical guide with a diffused channel waveguide and of a cover, that are created in borosilicate glass, and which includes a gap obtained by the use of suitable spacers, filled with a grating constituted of alternating strips of polymer and liquid crystal called POLICRYPS (Polymer Liquid CRYstal Polymer Slices), and with first electrodes that are coplanar to the support and next to the optical guide with a channel, that electrically control the grating making the filter tunable, and a manufacturing process.
Abstract:
It is provided a chip having a supporting substrate, a wavelength conversion layer, a base adhesive layer made of an organic resin, an upper-side substrate provided on an upper surface side of the wavelength conversion layer, and an upper-side adhesive layer made of an organic resin for adhering the wavelength conversion layer to the upper-side substrate. The wavelength conversion layer has an optical waveguide with a periodic domain inversion structure provided therein. The chip is heat treated. Anti-reflection films are formed on an incident side end face and projection side end face of the optical waveguide, respectively.
Abstract:
A method of manufacturing an optical device involves forming patterns on a dielectric substrate. The patterns include a waveguide pattern having a folded part, a conductor pattern positioned on an outer peripheral side of the folded part, and a dummy pattern that connects the folded part and the conductor pattern. The method further involves performing heat diffusion processing on the dielectric substrate on which the patterns have been formed at the forming, to make the waveguide pattern into an optical waveguide.
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:
An electroabsorption modulator comprises an absorption layer, at least one layer of p-doped semiconductor, and at least one layer of n-doped semiconductor, said absorption layer being provided between said at least one layer of p-doped semiconductor and said at least one layer of n-doped semiconductor, and said layers forming a ridge waveguide structure, wherein the thickness of said absorption layer is between 9 and 60 nm, the width of said absorption layer is between 4.5 and 12 microns, and the width of at least one of said at least one layer of p-doped semiconductor and said at least one layer of n-doped semiconductor is between 4.5 and 12 microns; whereby the width of said ridge waveguide structure is between 4.5 and 12 microns.
Abstract:
Optical guided mode fast 1×2 and 2×2 spatial switches are provided that can be used in multimedia communication networks. These switches require a relative refractive index change of only 0.0001˜0.0002 and can be realized using Lithium Niobate, Polymers, semiconductors, etc. Extinction ratios of these switches are made to be better than 45 dB, by introductions of a rear edge adjusted broken electrode and a blocker electrode into their architecture. Optical losses are less than 3 dB, and excellent switching characteristics are achieved by suppressing cross talk to ˜50 dB. The two output ports of the 1×2 (2×2) switch are made to be spatially perpendicular (in opposition) by introduction of air grooves, allowing for two-dimensional integration of unit switches into matrices. System applications of the switch are made flexible due to a discrete drive requirement for each optical input to the 2×2 switch.
Abstract:
An opto-electronic modulator includes a Mach-Zehnder structure that comprises p+in+-diodes in both arms of the Mach-Zehnder structure. The Mach-Zehnder structure is formed by waveguides so as to confine an optical mode in the opto-electronic modulator.
Abstract translation:光电调制器包括Mach-Zehnder结构,其包括在Mach-Zehnder结构的两个臂中的+ SUPER +二极管中的p + +。 Mach-Zehnder结构由波导形成,以便将光学模式限制在光电调制器中。
Abstract:
A wavelength converting element is provided in which a fundamental wave with respect to an optical crystal substrate and a peak of a vertical transverse mode of a second harmonic are made to coincide, the converting efficiency is good, and a beam shape which enables good joining to a lens or an optical fiber is obtained. Given that an angle formed by a surface of the optical crystal substrate and a C axis of the optical crystal substrate is θ, a period at which inverted domains are formed is p, and a distance from a distal end of a comb-shaped electrode for forming the inverted domain to a central position of a waveguide is G, in the ion implantation, a concentration peak of the ion implantation is formed at a distance of substantially (G·tan θ+p/4) from the surface of the optical crystal substrate.
Abstract translation:提供一种波长转换元件,其中使相对于光学晶体基板的基波和二次谐波的垂直横向模式的峰值一致,转换效率良好,并且能够良好地接合到 获得透镜或光纤。 假设由光学晶体基板的表面和光学晶体基板的C轴形成的角度为θ,则形成反转畴的周期为p,并且与梳状电极的远端的距离为 在波导的中心位置处形成反向域为G,在离子注入中离子注入的浓度峰值形成在与光学晶体表面基本上(G.tanθ+ p / 4)的距离处 基质。
Abstract:
A method for fabricating ion exchange waveguides, such as lithium niobate or lithium tantalate waveguides in optical modulators and other optical waveguide devices, utilizes pressurized annealing to further diffuse and limit exchange of the ions and includes ion exchanging the crystalline substrate with a source of ions and annealing the substrate by pressurizing a gas atmosphere containing the lithium niobate or lithium tantalate substrate above normal atmospheric pressure, heating the substrate to a temperature ranging from about 150 degrees Celsius to about 1000 degrees Celsius, maintaining pressure and temperature to effect greater ion diffusion and limit exchange, and cooling the structure to an ambient temperature at an appropriate ramp down rate. In another aspect of the invention a powder of the same chemical composition as the crystalline substrate is introduced into the anneal process chamber to limit the crystalline substrate from outgassing alkaline earth metal oxide during the anneal period. In yet another aspect of the invention an anneal container is provided that allows for crystalline substrates to be annealed in the presence of powder without contaminating the substrate with the powder during the anneal process. Waveguides manufactured in accordance with the method exhibit superior drift performance.
Abstract:
A multilayer semiconductor portion is provided on a semiconductor substrate on side faces of a semiconductor portion. A second conductive type III-V compound semiconductor layer is provided on the semiconductor portion and the multilayer semiconductor portion. The multilayer semiconductor portion has first to fourth semiconductor layers sequentially arranged on the semiconductor substrate. The first semiconductor layer is a first conductive type III-V compound semiconductor layer extending along the side face of the semiconductor portion and a principal surface of the semiconductor substrate. The second semiconductor layer is a second conductive type III-V group compound semiconductor layer extending along the first semiconductor layer. The third semiconductor layer is a first conductive type III-V compound semiconductor layer extending along the second semiconductor layer. The fourth semiconductor layer is a second conductive type III-V compound semiconductor layer provided on the third semiconductor layer.