Abstract: An electro-optical device includes a substrate, an optical waveguide formed on the substrate, a buffer layer formed on the substrate which is provided so as to cover the optical waveguide and an electrode formed on the buffer layer, when viewed in a propagation direction of light, a side surface of the optical waveguide has at least one slope change point. An electro-optical device can reduce the driving voltage and the propagation loss of light.

Abstract: The optical device includes a substrate and an optical waveguide formed on the substrate, a protrusion portion is formed on the substrate adjacent to the optical waveguide. Accordingly, an optical device which can achieve further suppression of the light propagation loss and higher reliability is provided.

Abstract: An optical modulators is disclosed. The optical modulator includes a substrate, an optical waveguide formed on the substrate, a signal electrode formed on the optical waveguide via a first buffer layer and applying a modulation signal to the optical waveguide, and a bias electrode formed on the optical waveguide via a second buffer layer and applying a DC bias to the optical waveguide, the first buffer layer and the second buffer layer are formed in such a way that either one of the first buffer layer and the second buffer layer covers an end surface of the other one of the first buffer layer and the second buffer layer at a boundary part of the first buffer layer and the second buffer layer. Accordingly, an optical modulator with high reliability can be provided.

Abstract: An optical modulator includes a substrate; an electro-optical material layer formed on a predetermined region of the substrate; a buffer layer formed on the substrate which is provided so as to cover the electro-optical material layer; and an electrode formed on the buffer layer. The electro-optical material layer has a RF portion optical waveguide which is applied with a modulation signal and is patterned, and a DC portion optical waveguide which is applied with a DC voltage and is patterned. The electrode has an RF portion electrode formed on the buffer layer where the RF portion optical waveguide is located and a DC portion electrode formed on the buffer layer where the DC portion optical waveguide is located. The film thickness of the DC portion electrode is smaller than the film thickness of the RF portion electrode.

Abstract: To provide an optical modulation element whereby reduced drive voltage and suppression of DC drift can be obtained at the same time. An optical modulation element includes: a substrate; and an optical waveguide formed of an electrooptic material film formed on the substrate and having a ridge part which is a protruding portion, and a slab part having a smaller film thickness than the ridge part 11r. The optical waveguide includes a first waveguide part having a first ridge width and a first slab film thickness and to which an RF signal is applied, and a second waveguide part having a second ridge width and a second slab film thickness different from the first slab film thickness and to which a DC bias is applied.

Abstract: An optical device includes: a substrate; and at least two optical waveguides formed on the substrate and facing to a multiplexed portion on the substrate in a light propagation direction, the optical waveguide includes a lamellar portion and a protruding portion which protrudes from the lamellar portion, in a cross section perpendicular to the light propagation direction, the thickness of the lamellar portion between the protruding portions of the at least two optical waveguides is greater than the thickness of the lamellar portion at the side of a side surface of the protruding portion of the optical waveguides, which does not face to other optical waveguides. Thereby, the transmission loss of light during multiplexing light can be reduced.

Abstract: An optical waveguide element includes: an optical waveguide having a ridge part and a slab part having a thickness less than the ridge part. The optical waveguide includes: a first waveguide having a first ridge with and a first slab film thickness; a second waveguide having a second ridge width and a second slab film thickness; a first intermediate waveguide connected to the first waveguide and having a third ridge width and the first slab film thickness; and a second intermediate waveguide connected to the second waveguide and having a fourth ridge width and the second slab film thickness. The first waveguide, the first intermediate waveguide, the second intermediate waveguide, and the second waveguide are arranged in this order; the second slab film thickness is larger than the first slab film thickness; and the third ridge width is larger than the fourth ridge width.

Abstract: An optical device including: a substrate; an optical waveguide formed at the substrate; and a protective layer formed adjacent to the optical waveguide, wherein the optical waveguide includes multiple side surfaces that intersect the substrate, at least one side surface of the optical waveguide is provided with a rough surface. According to the optical device of the present invention, the light propagation loss can be reduced.

Abstract: A server is connected to a communication terminal and configured to receive a departure point, a destination, and a route retrieval request from the departure point to the destination from the terminal and to deliver a route retrieved in response to the received route retrieval request to the terminal. When the route retrieval request is acquired from the terminal, the server acquires route information related to a target route that is a route corresponding to a predetermined distance from the departure point in a terminal-recommended route that is a route from the departure point to the destination and is retrieved by using terminal-side map information provided in the terminal. The server retrieves a route to the destination that includes at least a part of the target route by using device-side map information provided in the server and the route information, and delivers the retrieved route to the terminal.

Abstract: Movement guidance information for performing traveling guidance for a vehicle is requested to a guidance information delivering server device based on an area update table and an area identification table for managing an update state of map information in a communication terminal, and traveling guidance for the vehicle is performed based on the movement guidance information delivered from the guidance information delivering server device in response to the request.

Abstract: An information processing apparatus includes a memory, and a processor coupled to the memory and configured to receive a designation of a progression degree in which a circuit pattern displayed on a two-dimensional model of a printed circuit board is traced from a start point to an end point of the circuit pattern, display, on the two-dimensional model, the circuit pattern from the start point to a point corresponding to the progression degree on a three-dimensional model of the printed circuit board based on a setting of the start point and the end point of the circuit pattern, and display the circuit pattern of the two-dimensional model to distinguish a first pattern to form a part of the circuit pattern and a second pattern to form a part of the circuit pattern, the first pattern and the second pattern having portions overlapping each other.

Abstract: Facility output systems, methods, and programs specify a purpose for which a user utilizes a facility, based on information input by the user and a facility type that enables the specified purpose to be achieved, based on stored purpose information. The stored purpose information includes facility type and the purpose that is achievable by using the facility type. The systems, methods, and programs specify a common facility type that is common to a facility type specified for a first purpose; and one of a facility type specified for a second purpose that is different from the first purpose and a facility type specified differently from the specified facility type that enables the purpose to be achieved. The systems, methods, and programs specify the facility corresponding to the specified common facility type based on stored facility information including the specified facility type and information for specifying the facility.

Abstract: A coupling distance y of a plurality of securing elements for coupling two members to construct a casing for accommodating a circuit board having electric components mounted thereon inside space surrounded by a conductor extracted from design data, an overlapping width x of overlap sections provided to the two members for coupling the two members with the plurality of securing elements, the overlap sections contacting to each other, and a wavelength ? of electromagnetic noises generated from the electric components, are extracted. Then, a recommended coupling distance Y for the plurality of securing elements to attenuate the electromagnetic noises by a certain attenuation amount is calculated, based on the overlapping width x and the wavelength ?, and the coupling distance y is compared with the recommended coupling distance Y. Thereby, verifications of an electromagnetic noise countermeasure can be made reliably without relying on settings by a user.

Abstract: A housing includes a first member that has a first conductor, a second member that has a second conductor and cooperates with the first member to accommodate a circuit board on which an electronic element is mounted, inside a space surrounded by the first conductor and the second conductor, and a plurality of connecting elements that are arranged at a predetermined arrangement interval y to fix the second member to the first member.

Abstract: Navigation systems, methods, and programs output on an output device information on a set normal travel route when a guidance route for providing guidance to a user is not set. The systems, methods, and programs set a reference route satisfying a predetermined first setting condition as the normal travel route, and when the user travels along a temporary route that shares a start point and an end point with the reference route and is different from the reference route, specify a temporary travel factor that is a factor in which the user travels along the temporary route. The systems, methods, and programs set a second setting condition that varies depending on a content of the specified temporary travel factor, and change the normal travel route from the reference route to the temporary route, based on the second setting condition.

Abstract: A via adding method comprising: identifying a target area where a via is to be added in a printed circuit board; determining a starting point for starting a search for a location of the via in the target area; and moving a search point along a path in an intersecting direction that intersects a radial direction around the starting point while moving the search point in the radial direction and determining whether the via is to be added at a moved search point.

Abstract: A non-transitory recording medium storing a program that causes a computer to execute a circuit board design assistance process. The circuit board design assistance process includes: extracting, from design information of a multilayer circuit board in which a plurality of layers are layered, a plurality of ground patterns in the multilayer circuit board that are within a predetermined distance from a path of a signal that flows in the multilayer circuit board; resolving a region at which the plurality of ground patterns are electronically separated as being a discontinuity region; and displaying the resolved discontinuity region.

Abstract: An electromagnetic field simulation method includes: obtaining, when a reference signal including a plurality of frequencies is input to a first point of design data of an object, a variation of a reference signal at a second point by a computer through an electromagnetic field simulation; calculating variable data at each of the plurality of frequencies based on the variation of the reference signal; frequency-decomposing a signal applied to the first point; and calculating a frequency distribution of the signal at the second point which propagates from the first point based on the frequency-decomposed signal and the variable data at each of the plurality of frequencies.

Abstract: A design support apparatus includes: an area identifying unit configured to identify a target area where a via is to be added in a printed circuit board; a determining unit configured to determine a starting point for starting a search for a location of the via in the target area; and a searching unit configured to move a search point along a path in an intersecting direction that intersects a radial direction around the starting point while moving the search point in the radial direction and to determine whether the via is to be added at a moved search point.

Abstract: Search criterion information, which indicates a search criterion is transmitted to a search server, destination point information on a destination point, which is a point found by the search server based on the search criterion, is obtained, a candidate point database that stores candidate point information on a candidate point connected to a road in association with the candidate point is searched, the candidate point associated with the candidate point information having a similarity to the destination point information, higher than or equal to a predetermined reference similarity, is identified as an arrival point, and first guidance information that indicates a first route to the arrival point is generated when the arrival point has been identified and second guidance information that indicates a second route to a point closest to the destination point among points on roads is generated when the arrival point has not been identified.