Patent application number | Description | Published |
20090122817 | VARIABLE-WAVELENGTH FILTER AND VARIABLE-WAVELENGTH LASER - Only the light at an overlapping wavelength of the transmission characteristics of at least two wavelength selecting filters is looped, and at least one of the wavelength selecting filters varies a selected wavelength. Since a loss due to the optical filters is small and there is not a loss caused by a highly reflecting film, the output of an external-resonator variable-wavelength laser can be increased. Optical circuit component ( | 05-14-2009 |
20090141747 | EXTERNAL CAVITY WAVELENGTH TUNABLE LASER DEVICE AND OPTICAL OUTPUT MODULE - In an external cavity wavelength tunable laser device including an external cavity ( | 06-04-2009 |
20090257460 | EXTERNAL RESONATOR VARIABLE WAVELENGTH LASER AND ITS PACKAGING METHOD - The reflectance of a semiconductor optical amplifier ( | 10-15-2009 |
20090274187 | Semiconductor Laser, Module and Optical Transmitter - A semiconductor optical waveguide-A having an optical amplification function and a semiconductor optical waveguide-B having a light control function are integrated together on the same substrate. A facet of the semiconductor optical waveguide-A facing an isolation trench and a facet of the semiconductor optical waveguide-B facing the isolation trench are configured as a composite optical reflector/optical connector using an optical interference. The facet of the semiconductor optical waveguide-A achieves an optical reflectivity not higher than the reflectivity corresponding to a cleaved facet and not smaller than several percent, and an optical coupling coefficient of not lower than 50% between the semiconductor optical waveguide-A and the semiconductor optical waveguide-B. | 11-05-2009 |
20100111119 | EXTERNAL RESONATOR TYPE WAVELENGTH VARIABLE SEMICONDUCTOR LASER - In an external resonator type semiconductor wavelength tunable laser apparatus using a wavelength tunable mirror or a wavelength tunable filter which uses a refractive index change of liquid crystal, a resonant frequency is set as FR, when a response of the refractive index change to a drive voltage frequency of liquid crystal becomes maximum. A frequency F | 05-06-2010 |
20100246618 | EXTERNAL RESONATOR-TYPE WAVELENGTH TUNABLE LASER DEVICE - The present invention provides an external resonator-type wavelength tunable laser device that can properly fulfill a wavelength tuning function even with the use of a planar wavelength tunable reflector involving a considerable level of residual reflection. The external resonator-type wavelength tunable laser device includes a planar reflection structure enabling a reflection spectral peak wavelength to be varied and a semiconductor element as a semiconductor gain medium. The semiconductor gain medium is composed of a multiple quantum well in which product Γ·L of optical confinement constant Γ and semiconductor gain medium length L (μm) of a gain layer is at least 25 μm and at most 40 μm and in which gain peak wavelength λ0 (nm) observed during carrier injected with a maximum modal gain equal to an internal loss of the semiconductor gain medium is larger than −3·ΔR/2+(λc+35) and smaller than (−(Γ·L)/7+8)·ΔR+(−(Γ·L)+λc+45). Here, ΔR (dB) denotes a reflectance difference, and he (nm) denotes a wavelength at a center of an operating wavelength range of the wavelength tunable laser device. | 09-30-2010 |
20110002349 | WAVELENGTH-TUNABLE LASER APPARATUS AND WAVELENGTH CHANGING METHOD THEREOF - An object is to provide a wavelength-tunable laser apparatus that prevents a grid-hopping upon wavelength change, and a wavelength changing method thereof. A wavelength-tunable laser apparatus | 01-06-2011 |
20110249690 | EXTERNAL CAVITY WAVELENGTH TUNABLE LASER DEVICE AND OPTICAL OUTPUT MODULE - In an external cavity wavelength tunable laser device including an external cavity ( | 10-13-2011 |
20120133333 | ENERGY SYSTEM - An energy system having a plurality of storage batteries and renewable power supplies includes an information processor. Each of the storage batteries is individually set to a maximum SOC representing a charging limit and a minimum SOC representing a discharging limit. Each of the storage batteries is chargeable and dischargeable under the control of an external device and is capable of measuring SOC values. The information processor controls charging and discharging processes of the storage batteries individually to keep the storage batteries charged until SOC values acquired from the storage batteries reach the maximum SOC when the storage batteries are charged and to keep the storage batteries discharged until SOC values acquired from the storage batteries reach the minimum SOC when the storage batteries are discharged. | 05-31-2012 |
20120290232 | ELECTRIC POWER MEASUREMENT SYSTEM, ELECTRIC POWER MEASUREMENT METHOD, AND INFORMATION PROCESSING DEVICE - An electric device has an electric power measurement unit with an electric power detection element measuring consumed electric power and an information communication element transmitting the measured power. An electric power meter has an information communication element measuring and transmitting total electric power consumed indoors. An information processing unit stores the measured values in every predetermined sampling period. If a difference α of two measurement values of the electric power detection element is a finite value, the information processing unit calculates and stores both a difference β of two measurement values of the electric power meter corresponding to the two measurement values and β/α, and calibrates the amount of electric power consumed by the electric device and that is measured by the electric power detection element using a median of values of β/α obtained in a predetermined measurement period or a median of a predetermined number of values of β/α. | 11-15-2012 |
20130057211 | CHARGING CONTROL SYSTEM AND CHARGING CONTROL METHOD - Charging control section | 03-07-2013 |
20130134934 | CHARGING CONTROL SYSTEM - A charging controller ( | 05-30-2013 |
20130175997 | SECONDARY BATTERY SYSTEM AND CHARGE AND DISCHARGE METHOD FOR THE SAME - A secondary battery has a progressively degrading SOC that is an SOC at which the battery performance degrades during storage, and is charged and discharged by a controller. An information processor holds a first threshold value set in advance and lower than the progressively degrading SOC of the secondary battery, and a second threshold value set in advance and higher than the progressively degrading SOC, makes the controller continue an operation to charge the secondary battery from the first threshold value to the second threshold value at the time of charging the secondary battery based on the value of the SOC of the secondary battery detected by the controller, and makes the controller continue an operation to discharge the secondary battery from the second threshold value to the first threshold value at the time of discharging the secondary battery based on the value of the SOC of the secondary battery detected by the controller. | 07-11-2013 |
20130311000 | ELECTRIC POWER MANAGEMENT SYSTEM AND ELECTRIC POWER MANAGEMENT METHOD - The HEMS of each consumer transmits the amount of surplus electricity that is expected by to be generated by a PV system, and/or the amount of electric power that is needed by a controllable load, in a predetermined time slot on a predetermined date, to a server apparatus. The server apparatus, based on the notified amount of surplus electricity and the amount of electric power that is needed by the controllable load, combines a first consumer and a second consumer so that the amount of electric power needed by the controllable load will be equal to or greater than the amount of surplus electricity. Then, under the control the HEMS of the second consumer, the surplus electricity that is generated by the first consumer is consumed by each controllable load. | 11-21-2013 |
20130335025 | Charging Control System, Charging Control Method, and Program - A charging control system includes a flattened charging speed calculation unit that calculates a flattened charge speed for fully charging EVs at a constant speed according to permitted charging time for the EVs and the amount of charging required by the EVs; a charging speed calculation unit that calculates a charging speed for the EVs by multiplying the flattened charging speed by a request demand ratio function based on change over time in electric power demand requested from the electric power supply side; and a control unit that controls the charging of the EVs on the basis of the charging speed calculated by the charging speed calculation unit. | 12-19-2013 |
20130335032 | Charging Control System, Charging Control Method, and Recording Medium - A charging control system that controls charging of a plurality of vehicles that run on electricity includes: an assignment unit that assigns an order of priority relating to charging to the plurality of vehicles based on a predetermined index; a receiving unit that receives electric power demands that are requested from an electric power supply side; and a control unit that selects from among the plurality of vehicles in the order of highest priority charging-object vehicles in which the ON/OFF setting for turning charging ON and OFF is to be set to ON, and sets the ON/OFF setting of charging-object vehicles to the ON setting. The control unit changes the number of charging-object vehicles in response to changes in electric power demands over time. | 12-19-2013 |
20130335033 | Charging Control System, Charging Control Method, And Recording Medium - A charging control system that controls charging of an automobile that uses electric power as motive power include a receiving unit that receives electric power demands from an electric power supplier side; and a control unit that controls charging on and off of the automobile. The control unit changes a ratio of a charging-on duration and a charging-off duration in each duration in allowable charging durations for the automobile according to changes of the electric power demands over time. | 12-19-2013 |
20140197798 | SECONDARY BATTERY SYSTEM AND OPERATING METHOD OF SECONDARY BATTERY - A secondary battery has a progressively deteriorating SOC in which battery performance deteriorates when the secondary battery is stored, and is charged and discharged by a control device. An information processing device stores a preset first threshold smaller than the progressively deteriorating SOC of the secondary battery and a preset second threshold greater than the progressively deteriorating SOC, and separates the range from the minimum SOC to the maximum SOC of the secondary battery into, at least, two regions by setting the section from the first threshold to the second threshold as a boundary to thereby cause the control device to charge or discharge the secondary battery within any of the above regions. | 07-17-2014 |
20140217989 | BATTERY CONTROL SYSTEM, BATTERY CONTROLLER, BATTERY CONTROL METHOD, AND RECORDING MEDIUM - A battery control system for controlling operation of a part of a plurality of batteries connected to an electric power system includes: detection that detects a battery characteristic of each of the plurality of batteries; selection that selects, as candidates for an adjustment battery used to adjust power of the power system, batteries, each having a characteristic within a predetermined range of the battery characteristic, from the plurality of batteries, and selects the adjustment battery on the basis of a predetermined condition from the candidates for the adjustment battery; and control that outputs, to the adjustment battery, an operation instruction instructing a charge or discharge operation. | 08-07-2014 |
20140239913 | BATTERY CONTROL SYSTEM, BATTERY CONTROL DEVICE, BATTERY CONTROL METHOD AND RECORDING MEDIUM - A battery control system, which controls operation of a plurality of batteries connected to an electric power system, comprises: detecting means that detects a delay period of each of the batteries which represents a period that has elapsed after the battery control system supplies the battery with an execution command for charging or discharging the battery until the battery operates according to the execution command; measuring means that measures a frequency rate-of-change of electric power of the electric power system; selecting means that selects adjustment batteries for adjusting the electric power of the electric power system from the batteries based on the frequency rate-of-change and the delay period of each of the batteries; and command means for supplying the execution command to the adjustment batteries. | 08-28-2014 |
20140253037 | CHARGE CONTROL DEVICE, BATTERY MANAGEMENT DEVICE, CHARGE CONTROL METHOD, AND RECORD MEDIUM - A charge-control device that controls charging of vehicles, which use electric power as a drive source, using electric power from an electric power grid includes storage means storing a first period in a charge control period for which the charging is controlled; a second period other than the first period in the charge control period; and a target level of a charge demand in the first period; receipt means receiving from each of the vehicles the required charge amount; and control means controlling the charging using the target level of the charge demand in the first period, setting up a target level of charging in the second period based on a remaining total amount generated by subtracting the charge amount in the first period from a total amount of the plurality of required charge amounts to control the charging using the target level of the charging. | 09-11-2014 |