摘要:
A semiconductor laser device comprises: an active layer; a lower clad layer provided below the active layer; an upper clad layer provided above the active layer; and a current blocking layer, provided above the upper clad layer, for limiting an active region of the active layer in a direction along a width to make the active region of a striped form which has a wide portion and a narrow portion. According to the device, coherence of an oscillated laser beam is reduced, thereby to decrease a feedback induced noise when used for a pickup of an optical information recording/reproducing apparatus.
摘要:
A packet forwarding apparatus, a communication system, and a process rule update method that can accurately delete process rules used for packet forwarding and the like include a process rule storage unit that stores process rules defining a process content for each flow; a packet process unit that executes processing a received a packet by using a process rule matching the received packet among the process rules and; an end determination information extraction unit that extracts information for checking a flow end from the received packet; and a flow end check unit that deletes, when a flow end is checked based on the extracted information, a process rule corresponding to the flow.
摘要:
Conventional network quality monitoring systems require high monitoring cost, because: physical maintenance cost is high, since monitors are required to install on many portion of the network; the number of monitoring flows is apt to increase; the cost for information synchronization between monitors is required; and the network cost to collect information from apparatuses is required. In the present invention, based on a network whose route is definable by an external controller and changing the monitoring flow route appropriately, it is possible to perform monitoring of the communication quality under a small number of monitoring terminals and flows. Further, the role of the monitoring flow is divided into the monitoring flows to monitor the quality degradation occurrence and to specify the quality degradation point. The former is used for normal time, and the latter is for the quality degradation time. Consequently, the network monitoring system reducing the cost is proposed.
摘要:
Microorganisms (dielectric microparticles) in a liquid sample are captured using a dielectrophoretic force. After quantifying and analyzing, the microorganisms thus captured are concentrated and collected. In an apparatus for concentrating dielectric microparticles, a liquid sample, which contains the microorganisms to be examined, is supplied from a liquid sample-holding unit holding the liquid sample and passes through a voltage-applied cell. During the passage, the microorganisms are captured on dielectrophoretic electrodes by a dielectrophoretic force. Then, the captured microorganisms are released from the dielectrophoretic force by ceasing the voltage application. At the same time, a release liquid supplied from a release liquid-holding unit is flown through the dielectrophoretic electrodes so that the concentrated microorganisms are released and collected into a collection unit as the target bacteria.
摘要:
A gasifying agent supply path A from an axial flow compressor 21 which boosts pressure of a gasifying agent to a gasifying furnace 2 is branched, and a gasifying agent bypass path D having an escaping pressure adjusting valve 23 is provided. The flow quantity or pressure of the gasifying agent supplied to the gasifying furnace 2 from the gasifying agent supply path A can be adjusted according to the degree of opening of the adjusting valve 23 disposed in the gasifying agent bypass path D, whereby providing a control valve in the gasifying agent supply path A is no longer necessary. Thus, pressure loss at the gasifying agent supply path A can be suppressed, and the discharge pressure of the axial flow compressor 21 can be greatly reduced.
摘要:
A semiconductor laser device has a semiconductor laser element placed inside a package on an electrically conductive submount such that one of the electrodes with one conduction type sandwiching its p-n junction is electrically connected to it. The submount is placed on a metallic heat sink, separated therefrom by a layer of an electrical insulator having a larger thermal conductivity than the submount. The other electrode of the laser element (of the opposite conduction type) is electrically connected to the heat sink, and one of externally extending lead pins is electrically connected to the submount. According to a preferred embodiment, the other electrode of the laser element is electrically connected instead to one of the lead pins and the submount is electrically connected instead to another of the lead pins. Thus, the capacitance of the submount and the inductance of the package will be in an electrically floating condition when the laser device is activated, and the device is adapted for high-frequency operations.
摘要:
A semiconductor laser having a double hetero junction structure including: an active layer; cladding layers including an upper layer and a lower layer, the cladding layers sandwiching the active layer; and a current blocking layer including a stripe recess for acting as a current passage. The current blocking layer is provided within at least one of the cladding layers. The current blocking layer comprises a plurality of layers, at least one layer of the layers having a slit therein extending transversely to the stripe recess.
摘要:
In a coal gasification power generator, coal gas 500 obtained by gasifying a coal 100 by a gasifying furnace is introduced into a desulfurization furnace in which the coal gas 500 is desulfurized by limestone 400. A coal gas 501 after desulfurization is burned by a combuster 5 after it has passed through a dust removing unit 3 so that high temperature combustion gas 800 is supplied to a gas turbine. The gas turbine 7 drives a power generating unit. Exhaust gas 801 from the gas turbine is supplied to an exhaust gas boiler 8. Char 60a produced in the gasifying furnace and limestone 60b containing CaS emitted from the desulfurization furnace are burned in an oxidation furnace, and by using the resultant combustion gas, water vapor introduced from the exhaust gas boiler 8 is heated by a heat exchanger, and thereafter it is supplied to the gasifying furnace as a gas. With the above construction, chemical energy possessed by the coal is effectively converted into electric energy, and also the rate of desulfurization of coal gasifying gas is improved thereby reducing emitted sulfur oxide.
摘要:
A thermal transfer material comprises a film-form base on one side of which a thermal transfer pigment layer is provided wherein the other side of said film-form base has a back coating layer comprising a polysaccharide derivative(s) reacted with organopolysiloxane or a cured product thereof.
摘要:
A semiconductor laser includes an active layer having a light-emitting region of striped structure. A cladding layer is formed on the active layer. Another cladding layer is formed under the active layer. The active layer is interposed between the cladding layer and the another cladding layer. Facets are formed on both ends of a stripe of the light-emitting region in which a part of light emitted radiated, and the remaining light is reflected and amplified. The semiconductor laser includes a means for having a minimum value of a coherence in a range between 2 mW and 7 mW of output of a light radiated from one of the facets which is a light output, and for preventing a phenomenon in which the output is reduced in a range at most 25 mW in accordance with an increase of the current, varied by a variation of a current applied to the active layer.