摘要:
The present invention provides a light-receiving device that may escape the device from the breakdown thereof and may suppress an optical loss. The light-receiving device of the invention includes a surface to sense the light and a thin film made of PbSe nano-particles, diameters of which are smaller than 20 nm. This thin film operates as an optical fuse, so the device may be escaped from the breakdown thereof. Moreover, the thin film is disposed directly onto the light-sensing surface of the device, the optical loss cause between the thin film and the sensing surface may be suppressed.
摘要:
The present invention provides a line transition and a method for manufacturing the same. The line transition is constructed such that a planar circuit can be arranged in the direction parallel to the propagation direction of electromagnetic waves propagating through a solid waveguide, the coupling characteristics of the solid waveguide with the planar circuit formed on a dielectric substrate are not influenced by the assembly precision of the waveguide and the circuit, and the line transition characteristics are not affected by a variation in manufacturing the dielectric substrate. Notches are formed at the edges of the dielectric substrate in the vicinities of coupled-line pattern segments formed on a dielectric substrate. The notches are formed by punching through holes in a ceramic green sheet serving as a motherboard, firing the motherboard, and cutting the motherboard using dicing lines passing through the through holes.
摘要:
A invented computer system has a plurality of computer boards; a plurality of terminals, each of which is coupled to each of the computer boards respectively via a network; a storage device having a plurality of storage areas, which is coupled to each of the computer boards; and a management computer; and wherein the management computer manages a correspondence between a user information and the storage area, and when a use request of the computer board is transmitted from a terminal, the management computer selects a usable computer board to turn on a power, reads information necessary to start the computer board from the storage corresponding to the transmitted user information, allows the computer board to start based on the read information, and notifies the terminal of information on the started computer board and identification information on the network allocated to the started computer board.
摘要:
The present invention provides a line transition and a method for manufacturing the same. The line transition is constructed such that a planar circuit can be arranged in the direction parallel to the propagation direction of electromagnetic waves propagating through a solid waveguide, the coupling characteristics of the solid waveguide with the planar circuit formed on a dielectric substrate are not influenced by the assembly precision of the waveguide and the circuit, and the line transition characteristics are not affected by a variation in manufacturing the dielectric substrate. Notches are formed at the edges of the dielectric substrate in the vicinities of coupled-line pattern segments formed on a dielectric substrate. The notches are formed by punching through holes in a ceramic green sheet serving as a motherboard, firing the motherboard, and cutting the motherboard using dicing lines passing through the through holes.
摘要:
The present invention relates to an optical fiber which enables favorable optical communications in 1.3-μm and 1.55-μm wavelength bands, and an optical transmission system including the same. The optical fiber according to the present invention has only one zero-dispersion wavelength within a wavelength range of 1.20 μm to 1.60 μm, the zero-dispersion wavelength existing within a wavelength range of 1.37 μm to 1.50 μm , and has a positive dispersion slope at the zero-dispersion wavelength, thereby enabling favorable optical communications utilizing each signal light in the 1.3-μm and 1.55-μm wavelength bands sandwiching the zero-dispersion wavelength.
摘要:
A radar system includes a detection-control circuit for transmitting and receiving the beam of a millimeter-wave signal for detecting a relative position and a relative speed to a target, and a scanning unit for scanning the direction of the beam over a predetermined range. The state of the scanning unit can be switched between a resting state wherein scanning is stopped and the beam is directed towards the center of the scanning range while the detection-control circuit continues detection control, and a scanning state wherein the direction of the beam is scanned over a predetermined range.
摘要:
The present invention relates to a dispersion-managed optical fiber which can be manufactured easily and has a structure which enables the easy connection thereof with other optical fiber and the like. The dispersion-managed optical fiber is a silica-based optical fiber ensuring its single mode at a predetermined wavelength within a signal wavelength band, in which first portions each having a positive chromatic dispersion and second portions each having a negative chromatic dispersion are arranged alternately and adjacent to each other. In the dispersion-managed optical fiber, the dopant concentration is made uniform in the longitudinal direction and, corresponding to the above-mentioned first and second portions, the refractive index of a glass layer not doped with GeO2 as a dopant is adjusted or the residual stresses in glass layers are changed.
摘要:
A distributed control device in a decentralized supervisory control system comprises an I/O interface, a data storage section for storing PIO data from a controller and additional information such as data obtention time, a time obtention section for adding a time to the data when the data is stored in the data storage section, a data distribution section for distributing the PIO data and other supervisory information, a supervisory control section for carrying out supervisory control using the PIO data from the controller, a network interface for communicating with other distributed control devices and the supervisory device, and a communication section for connecting this distributed control device to the other distributed control devices and the supervisory device.
摘要:
A first electrode layer having a first electrodeless portion is formed on the upper surface of a dielectric plate, a second electrode layer having a second electrodeless portion opposing the first electrodeless portion is forced on the lower surface of a second dielectric plate, and electric lines are formed by an intermediate electrode layer formed between the first and second electrode layers.
摘要:
The present invention relates to a single-mode optical fiber having a configuration which enables lowering of dispersion slope while securing a sufficient MFD. This single-mode optical fiber has a refractive index profile in which an indent with a sufficient width is provided at the center of its core region. In particular, this indent satisfies the following relationship: a·(&Dgr;n2−&Dgr;n1)/(b·&Dgr;n2)≧0.04 when the first core portion in the single-mode optical fiber has a mean relative refractive index difference of &Dgr;n1 with respect to the cladding portion and an outer diameter of a while the second core portion has a mean relative refractive index difference of &Dgr;n1 with respect to the cladding portion and an outer diameter of b.