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    • 64. 发明申请
    • METHOD FOR INCREASING LASER MODULATION BANDWIDTH
    • 增加激光调制带宽的方法
    • WO02019483A2
    • 2002-03-07
    • PCT/RU2001/000291
    • 2001-07-16
    • H01S5/32H01S5/22H01S5/223H01S5/00
    • H01S5/223H01S5/2222
    • The inventive method relates to the regulation of the laser modulation bandwidth of injection lasers, in particular dynamic single-mode modulation lasers and single frequency lasers by modifying a doping of confining doped underlayers of a maximal optical confinement nearest to an active layer and by regulating a ratio between a P concentration of holes in the underlayer of the maximal optical confinement of the p-type conductivity from the p-type side and an N concentration of electrons in the underlayer of the maximal optical confinement from the n-type side (P/N ratio). The P concentration is chosen from a range between 4•10 cm and 1•10 cm , and the N concentration is chosen from a range between 2•10 cm and 2•10 cm , the P/N ratio being greater than one. In addition, the following conditions shall be fulfilled: a background impurity level is maintained between the confining doped underlayers of the maximal optical confinement which are nearest to the active layer, including the active layer itself; edges of a p-i-n space charge of a heterojunction are arranged in the confining doped underlayers of the maximal optical confinement.
    • 本发明的方法涉及通过修改最接近有源层的最大光学约束的约束掺杂底层的掺杂,并通过调节一个或多个激光器的方法来调节注射激光器的激光调制带宽,特别是动态单模调制激光器和单频激光器 来自p型侧的p型导电性的最大光学限制的底层中的P的空穴浓度与来自n型侧的最大光学限制的底层中的电子的N浓度之比(P / N比)。 P浓度选自4•10 17 cm -3和1•10 19 cm -3之间的范围,N浓度选自2•10 17 cm -3和2•10 18 cm -3,P / N比大于1。 此外,应满足以下条件:在最接近活性层的最大光学约束的约束掺杂底层之间保持背景杂质水平,包括活性层本身; 异质结的p-i-n空间电荷的边缘被布置在最大光学限制的约束掺杂底层中。
    • 68. 发明申请
    • HIGH-POWER QUANTUM CASCADE LASERS WITH ACTIVE-PHOTONIC-CRYSTAL STRUCTURE FOR SINGLE, IN-PHASE MODE OPERATION
    • 具有主动 - 光子晶体结构的大功率量子级激光器,用于单相,相模式操作
    • WO2012125229A3
    • 2013-03-14
    • PCT/US2012023074
    • 2012-01-30
    • WISCONSIN ALUMNI RES FOUNDBOTEZ DANKIRCH JEREMY D
    • BOTEZ DANKIRCH JEREMY D
    • H01S5/40H01S5/20H01S5/34
    • H01S5/3402B82Y20/00H01S5/105H01S5/12H01S5/2218H01S5/223H01S5/4031H01S2301/166
    • Semiconductor laser array devices capable of emitting mid- to long-wavelength infrared (i.e., 4-12 µm) radiation are provided. The devices include a quantum cascade laser (QCL) structure comprising one or more active cores; an optical confinement structure; a cladding structure, and a plurality of laterally-spaced trench regions extending transversely through the cladding and optical confinement structures, and partially into the QCL structure. The trench regions define a plurality of laterally-spaced interelement regions separated by element regions in the laser array device. The element regions are characterized by a nonuniform structure across their widths. As a result of this structural non-uniformity, array modes composed of coupled first-order lateral modes of the element regions are preferentially suppressed relative to array modes composed of coupled fundamental lateral modes of the element regions.
    • 提供能够发射中长波长红外(即4-12μm)辐射的半导体激光阵列器件。 这些装置包括包含一个或多个活性核心的量子级联激光器(QCL)结构; 光学限制结构; 包层结构,以及横向延伸穿过包层和光限制结构的多个横向间隔开的沟槽区域,并且部分地延伸到QCL结构中。 沟槽区域限定由激光器阵列器件中的元件区域分开的多个横向间隔的元件区域。 元件区域的特征在于其宽度上的不均匀结构。 作为这种结构不均匀的结果,相对于由元件区域的耦合的基本横向模式组成的阵列模式,优选地抑制由元件区域的耦合的一阶横向模式组成的阵列模式。