摘要:
An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration is provided. In a method of driving a laser diode, the laser diode is driven by a pulse current which is 10 or more times higher than a threshold current value. The width of the pulse current is preferably 10 nanoseconds or less, and the value of the pulse current is specifically 0.4 amperes or over.
摘要:
A method for manufacturing a bi-section semiconductor laser device includes the steps of (A) forming a stacked structure obtained by stacking, on a substrate in sequence, a first compound semiconductor layer of a first conductivity type, a compound semiconductor layer that constitutes a light-emitting region and a saturable absorption region, and a second compound semiconductor layer of a second conductivity type; (B) forming a belt-shaped second electrode on the second compound semiconductor layer; (C) forming a ridge structure by etching at least part of the second compound semiconductor layer using the second electrode as an etching mask; and (D) forming a resist layer for forming a separating groove in the second electrode and then forming the separating groove in the second electrode by wet etching so that the separating groove separates the second electrode into a first portion and a second portion.
摘要:
A laser diode element assembly includes: a laser diode element; and a light reflector, in which the laser diode element includes (a) a laminate structure body configured by laminating, in order, a first compound semiconductor layer of a first conductivity type made of a GaN-based compound semiconductor, a third compound semiconductor layer made of a GaN-based compound semiconductor and including a light emission region, and a second compound semiconductor layer of a second conductivity type made of a GaN-based compound semiconductor, the second conductivity type being different from the first conductivity type, (b) a second electrode formed on the second compound semiconductor layer, and (c) a first electrode electrically connected to the first compound semiconductor layer, the laminate structure body includes a ridge stripe structure, and a minimum width Wmin and a maximum width Wmax of the ridge stripe structure satisfy 1
摘要:
According to at least one embodiment, a television includes a housing further including a pair of corner portions and an enclosed space on an inner side thereof, a pair of speaker boxes housed in the enclosed space in vicinities of the corner portions, a pair of speakers housed in the speaker boxes respectively in a direction which crosses a thickness direction of the housing, and each of the speaker boxes further includes a first duct to guide sounds from a first side of the respective speaker to the respective first opening portion and a second duct to guide sounds from a second side of the respective speaker towards the enclosed space.
摘要:
An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration. The laser diode can be driven by a pulse current which is 10 or more times higher than a threshold current value. The width of the pulse current is preferably 10 nanoseconds or less, and the value of the pulse current is specifically 0.4 amperes or over.
摘要:
A light oscillation device has a self oscillation semiconductor laser that has a double quantum well separated confinement heterostructure made of GaInN/GaN/AlGaN materials and that includes a saturable absorber section which is applied with a negative bias voltage and a gain section into which a gain current is injected, a light separation unit that separates a portion of laser light beams from the self oscillation semiconductor laser, a light sensing element that senses the laser light beams separated by the light separation unit, and a current control circuit which controls a current injected into the gain section of the self oscillation semiconductor laser based on an amount of the laser light beams which are sensed by the light sensing element.
摘要翻译:光振荡装置具有自激振荡半导体激光器,其具有由GaInN / GaN / AlGaN材料制成的双量子阱分离的限制异质结构,并且包括施加负偏置电压的可饱和吸收体部分和增益部分 电流被注入,分离来自自身振荡半导体激光器的激光束的一部分的光分离单元,感测由光分离单元分离的激光束的感光元件,以及控制注入电流的电流控制电路 基于由感光元件感测的激光束的量,进入自身振荡半导体激光器的增益部。
摘要:
There is provided a driving method of a self-oscillating semiconductor laser device including a first compound semiconductor layer having a first conductive type and composed of a GaN base compound semiconductor, a third compound semiconductor layer and a second compound semiconductor layer configuring an emission region and a saturable absorption region, are successively laminated, a second electrode formed on the second compound semiconductor layer, and a first electrode electrically connected to the first compound semiconductor layer. The second electrode is separated into a first portion to create a forward bias state by passing current to the first electrode via the emission region and a second portion to apply an electric field to the saturable absorption region by a separation groove. The current greater than a current value where kink is occurred in optical output-current characteristics is to be passed to the first portion of the second electrode.
摘要:
[Object] To allow smooth discharge of a gas accumulated in a fuel injection device for injecting/supplying fuel to an engine intake passage.[Means] There is provided a fuel injection device (3A) comprising a fuel pump (31), a solenoid valve (32) for injecting pressurized fuel into the intake passage (10) of an engine (1), a high-pressure fuel passage (36) that extends from the fuel pump (31) to the solenoid valve (32) and has a medially positioned constant-pressure chamber (33A), and a fuel return passage (38) connected to a fuel return pipe (6), with the fuel return passage extending from the constant-pressure chamber (33A) and having a medially positioned priming pump (34A), wherein the constant-pressure chamber (33A) is configured so that the top wall in the upper space thereof is disposed above the opening of the high-pressure fuel passage (36) opposite from the solenoid valve (32), the fuel return passage (38) opens into the upper space at a position above the opening of the high-pressure fuel passage (36), and the gas accumulating in the constant-pressure chamber (33A) is discharged from the upper space toward the fuel tank (2) via the fuel return passage (38).
摘要:
According to one embodiment, an information processing apparatus includes a first battery, a second battery whose capacity is smaller than capacity of the first battery, a solar battery, a charging circuit, an illumination sensor and a controller. The charging circuit is configured to charge the second battery with power output from the solar battery. The controller is configured to control the charging circuit in accordance with a sensing result of the illumination sensor.
摘要:
An electronic device has a first cabinet and a second cabinet. The second cabinet has a locking module including a hook, an operation member and a linking mechanism. The hook is formed at a position near a top end of the second cabinet around the center in the lateral direction in opened state, and is engaged with the first cabinet to lock the second cabinet in the closed state. The operation member disengages the hook from the first cabinet in response to operation. The linking mechanism links the operation to movement of disengaging the hook. The second cabinet further has a board mounted with a camera module having an image taking lens and an imaging device and a signal processing circuit for the camera module. The board is disposed at such a position that a portion in which the signal processing circuit is mounted overlaps with the linking mechanism.