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    • 4. 发明公开
    • 반도체 레이저장치
    • 半导体激光器件
    • KR1020010021336A
    • 2001-03-15
    • KR1020000047452
    • 2000-08-17
    • 가부시끼가이샤 도시바
    • 겐에이고이치시오자와히데오다나카아키라
    • H01S5/20
    • H01S5/4031H01S5/4087
    • PURPOSE: A semiconductor laser device is provided to reduce the height of band gap discontinuity, and to improve an operating voltage and an operating current by forming an active layer with bulk structure with a specific film thickness at the first laser element, and by forming the active layer with the lamination structure of quantum well and barrier layers in a second laser element. CONSTITUTION: Laser elements(40, 41) that have wavelength 780 and 650 nm, respectively, are formed on the same n-type GaAs crystal substrate. In both the laser elements(40, 41), second p-type cladding layers(18, 28) are machined to projecting strip called a ridge, and both the sides are buried by a GaAs current element layer(31), thus constricting current flowing into an active layer, and generating strip-shaped gain distribution in the active layer. In this case, an active layer(14) has an undoped layer of AlGaAs with a layer thickness of 0.01 μm or more and 0.1 nm or less, namely, bulk structure, and an active layer(24) is a multi quantum well active layer being composed of the undoped well layer and a barrier layer.
    • 目的:提供一种半导体激光器件,以减小带隙不连续性的高度,并且通过在第一激光元件处形成具有特定膜厚的体积结构的有源层来提高工作电压和工作电流,并且通过形成 在第二激光元件中具有量子阱和势垒层的层叠结构的活性层。 构成:分别在同一n型GaAs晶体衬底上形成具有780和650nm波长的激光元件(40,41)。 在这两个激光元件(40,41)中,第二p型覆层(18,28)被加工成被称为脊的凸出条,并且两个边被GaAs电流元件层(31)掩埋,从而收缩电流 流入有源层,并在活性层中产生带状增益分布。 在这种情况下,有源层(14)具有层厚度为0.01μm以上且0.1nm以下的AlGaAs的未掺杂层,即体结构,有源层(24)为多量子阱活性层 由未掺杂的阱层和阻挡层组成。
    • 5. 发明公开
    • 반도체 레이저장치 및 그 제조방법
    • 半导体激光器件及其制造方法
    • KR1020030019245A
    • 2003-03-06
    • KR1020020051886
    • 2002-08-30
    • 가부시끼가이샤 도시바
    • 겐에이고이치다나카아키라이토요시유키와타나베미노루오쿠다하지메
    • H01S5/30
    • B82Y20/00H01S5/028H01S5/162H01S5/2004H01S5/209H01S5/2231H01S5/3211H01S5/3436H01S2301/185
    • PURPOSE: To provide a semiconductor laser device which is superior in a spreading angle of light, kink characteristics, and temperature characteristics, and to provide its manufacturing method. CONSTITUTION: A semiconductor laser device is equipped with a first conductivity-type clad layer (103) having a certain refractive index constant in the direction of thickness; an active layer (107) formed thereon; a second conductivity-type clad layers (108 and 110) which are formed thereon, have refractive indexes constant in the direction of thickness, are provided with a ridge that is located thereon, and extends in parallel with the direction of laser resonance; and a current block layer (113) provided on each side of the ridge. A current constricted by the current block layer (113) is injected into the active layer through the intermediary of the top surface of the ridge, the first conductivity-type clad layer (103) and the second conductivity-type clad layers (108 and 110) are formed of semiconductor of nearly the same composition, and the first conductivity-type clad layer (103) is set larger in thickness than the second conductivity-type clad layers containing the ridge.
    • 目的:提供一种在光扩展角度,扭结特性和温度特性方面优越的半导体激光器件,并提供其制造方法。 构成:半导体激光装置配备有在厚度方向上具有一定折射率常数的第一导电型覆盖层(103) 形成在其上的有源层(107) 在其上形成的第二导电型覆盖层(108和110)在厚度方向上的折射率恒定,设置有位于其上的脊,并且与激光谐振的方向平行地延伸; 以及设置在所述脊的每一侧上的当前阻挡层(113)。 由当前阻挡层(113)收缩的电流通过脊的顶表面介于有源层中,第一导电型覆盖层(103)和第二导电型覆盖层(108和110) )由几乎相同组成的半导体形成,并且第一导电型覆盖层(103)的厚度设定为比包含脊的第二导电型覆盖层的厚度大。
    • 8. 发明授权
    • 반도체 레이저장치
    • 반도체레이저장치
    • KR100394332B1
    • 2003-08-09
    • KR1020000047452
    • 2000-08-17
    • 가부시끼가이샤 도시바
    • 겐에이고이치시오자와히데오다나카아키라
    • H01S5/20
    • H01S5/4031H01S5/4087
    • This is a double wavelength semiconductor laser unit having a first laser emitting a light of a first wavelength and a second laser emitting a light of a second wavelength different from the first wavelength. The first and second lasers are merged on a substrate. The first laser has a bulk active layer whose film thickness is 0.01 mum or more and 0.1 mum or less. And the second laser has an MQW active layer constituted by stacked structure composed of a quantum well layer and a barrier layer. By employing the bulk active layer for the first laser, it is possible to reduce the band gap discontinuity induced at a boundary between a cladding layer and the bulk active layer, and then decreases an operational voltage, and further improve the reliability of the first laser.
    • 这是双波长半导体激光器单元,其具有发射第一波长的光的第一激光器和发射不同于第一波长的第二波长的光的第二激光器。 第一和第二激光合并在衬底上。 第一激光器具有膜厚度为0.01μm以上至0.1μm以下的体活性层。 并且第二激光器具有由量子阱层和阻挡层构成的堆叠结构构成的MQW有源层。 通过使用第一激光器的体有源层,可以减少在包层和体有源层之间的边界处引起的带隙不连续性,然后降低工作电压,并且进一步提高第一激光器的可靠性 。