利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

28 条记录 (耗时 0.042 秒)

    Broadband cascade light emitters
    11.
    发明授权
    Broadband cascade light emitters 有权
    宽带级联发射器

    公开(公告)号：US07010010B2

    公开(公告)日：2006-03-07

    申请号：US10465253

    申请日：2003-06-19

    申请人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Milton L. Peabody ,  Arthur Mike Sergent ,  Deborah Lee Sivco ,  Alexander Soibel

    发明人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Milton L. Peabody ,  Arthur Mike Sergent ,  Deborah Lee Sivco ,  Alexander Soibel

    IPC分类号： H01S5/00

    CPC分类号： B82Y20/00 ,  H01S5/06 ,  H01S5/1096 ,  H01S5/22 ,  H01S5/2214 ,  H01S5/3422 ,  H01S5/34306 ,  H01S5/34313 ,  H01S2304/02

    摘要： A broadband CLE capable of operation simultaneously at multiple wavelengths comprises: a core region including a multiplicity or cascade of stages, each stage including a radiative transition region. A first group of stages emits radiation at a first wavelength and at a first aggregate intensity per group, and a second group of stages emits radiation at a second wavelength and at a second aggregate intensity per group lower than the first intensity. The invention is characterized in that the second group has more stages than said first group, and the per-stage intensity of the first group is greater than that of the second group. This design reduces the difference between said first and second aggregate intensities. In one embodiment, groups that are located at or near to the ends of the cascade have more stages than groups that are centrally located within the cascade regardless of their wavelength. Our invention significantly reduces variations in modal gain across the desired broadband spectrum and produces sufficiently flat gain without requiring elaborate redesign of the stages. These features enable cw operation of a broadband intersubband laser.

    摘要翻译： 能够在多个波长同时运行的宽带CLE包括：包括多个或级联级的核心区域，每个阶段包括辐射过渡区域。 第一组阶段以每组发射第一波长和第一聚集强度的辐射，而第二组阶段以低于第一强度的第二波长发射辐射，并以每组的第二聚集强度发射。 本发明的特征在于，第二组具有比所述第一组更多的阶段，并且第一组的每阶段强度大于第二组的每阶段强度。 该设计减少了所述第一和第二聚集强度之间的差异。 在一个实施例中，位于级联端部处或附近的组具有比级联中心位置的级更多的级，而不管它们的波长如何。 我们的发明显着地减少了所需宽带频谱的模态增益的变化，并产生足够平坦的增益，而不需要对级进行精心的重新设计。 这些功能可以实现宽带子带间激光器的cw操作。

    Long wavelength semiconductor lasers incorporating waveguides based on surface plasmons
    12.
    发明授权
    Long wavelength semiconductor lasers incorporating waveguides based on surface plasmons 失效
    结合基于表面等离子体激元的波导的长波长半导体激光器

    公开(公告)号：US06301282B1

    公开(公告)日：2001-10-09

    申请号：US09124295

    申请日：1998-07-29

    申请人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Albert Lee Hutchinson ,  Deborah Lee Sivco ,  Jerome Faist ,  Carlo Sirtori

    发明人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Albert Lee Hutchinson ,  Deborah Lee Sivco ,  Jerome Faist ,  Carlo Sirtori

    IPC分类号： H01S500

    CPC分类号： B82Y20/00 ,  H01S5/10 ,  H01S5/1046 ,  H01S5/323 ,  H01S5/3402 ,  H01S2301/145

    摘要： A long wavelength (e.g., mid-IR to far-IR) semiconductor laser comprises an active region and at least one cladding region characterized in that the cladding region includes a light guiding interface between two materials which have dielectric constants opposite in sign. Consequently, the guided modes are transverse magnetic polarized surface waves (i.e., surface plasmons) which propagate along the interface without the need for a traditional dielectric cladding. In a preferred embodiment, the interface is formed between a semiconductor layer and a metal layer. The complex refractive index of the metal layer preferably has an imaginary component which is much larger than its real component. In an illustrative embodiment, our laser includes a QC active region sandwiched between a pair of cladding regions one of which is a guiding interface based on surface plasmons and the other of which is a dielectric (e.g., semiconductor) structure.

    摘要翻译： 长波长（例如，中红外至红外IR）半导体激光器包括有源区和至少一个包层区，其特征在于包层区包括具有与符号相反的介电常数的两种材料之间的导光界面。 因此，引导模式是横向磁极化表面波（即，表面等离子体激元），其沿着界面传播而不需要传统的电介质包层。 在优选实施例中，界面形成在半导体层和金属层之间。 金属层的复合折射率优选具有远大于其实际分量的虚部。 在说明性实施例中，我们的激光器包括夹在一对包层区域之间的QC有源区域，其中一个是基于表面等离子体激元的引导界面，另一个是电介质（例如半导体）结构。

    Optical amplifier for quantum cascade laser
    15.
    发明授权
    Optical amplifier for quantum cascade laser 有权
    用于量子级联激光器的光放大器

    公开(公告)号：US06836499B2

    公开(公告)日：2004-12-28

    申请号：US10155562

    申请日：2002-05-24

    申请人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Deborah Lee Sivco ,  Mariano Troccoli

    发明人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Deborah Lee Sivco ,  Mariano Troccoli

    IPC分类号： H01S500

    CPC分类号： B82Y20/00 ,  H01S5/026 ,  H01S5/1064 ,  H01S5/12 ,  H01S5/3402 ,  H01S5/50

    摘要： Techniques for amplifying light produced by a quantum cascade laser are described. An assembly according to the present invention includes an optical amplifier having an optical input and an optical output. The optical output has an area significantly greater than that of the optical output and the geometry of the amplifier is such that the amplifier widens from the optical input to the optical output. The optical amplifier is formed of a layered waveguide structure which achieves quantum confinement of electrons and photons within the active region. A distributed feedback laser is suitably coupled to the optical amplifier at the optical input of the amplifier. The widening of the amplifier makes available a large number of electrons, so that the amplifier is able to produce many photons resulting from stimulated transitions caused by introduction of light to the optical input of the amplifier, even if the great majority of the transitions occur nonradiatively.

    摘要翻译： 描述用于放大由量子级联激光器产生的光的技术。 根据本发明的组件包括具有光输入和光输出的光放大器。 光输出具有明显大于光输出的面积，并且放大器的几何形状使得放大器从光输入增宽到光输出。 光放大器由层状波导结构形成，其在有源区内实现电子和光子的量子限制。 分布式反馈激光器适当地耦合到放大器的光输入处的光放大器。 放大器的加宽使得可以获得大量的电子，使得放大器能够产生由于通过向放大器的光输入引入光引起的受激变换而产生的许多光子，即使绝大多数的跃迁是非辐射的 。

    Engineering the gain/loss profile of intersubband optical devices having heterogeneous cascades
    16.
    发明授权
    Engineering the gain/loss profile of intersubband optical devices having heterogeneous cascades 有权
    设计具有异质级联的子带间光学器件的增益/损耗曲线

    公开(公告)号：US06728282B2

    公开(公告)日：2004-04-27

    申请号：US09883542

    申请日：2001-06-18

    申请人： Federico Capasso ,  Alfred Yi Cho ,  Rafaelle Colombelli ,  Claire F. Gmachl ,  Hock Min Ng ,  Deborah Lee Sivco

    发明人： Federico Capasso ,  Alfred Yi Cho ,  Rafaelle Colombelli ,  Claire F. Gmachl ,  Hock Min Ng ,  Deborah Lee Sivco

    IPC分类号： H01S500

    CPC分类号： B82Y20/00 ,  H01S5/3402 ,  H01S5/3422 ,  H01S5/4087 ,  H01S2301/18

    摘要： An optical device includes a stack of at least two different intersubband (ISB) optical sub-devices in which the gain/loss profiles of the individual ISB sub-devices are mutually adapted, or engineered, so as to generate a predetermined overall function for the combination. We define this combination device as being heterogeneous since not all of the individual ISB sub-devices are identical to one another. Illustratively, the parameters of each individual ISB sub-device that might be subject to this engineering process include: the peak energy of the ISB optical transitions (emission or absorption) associated with each RT region, the position of each sub-device in the stack; the oscillator strengths of these ISB transitions; the energy bandwidth of each transition; and the total length of the RT and I/R regions of each ISB sub-device. In one embodiment, our approach may be used to engineer a gain profile that has peaks at a multiplicity of different wavelengths, thus realizing a multi-wavelength ISB optical source in which the applied electric field self-proportions itself so that each individual ISB sub-device experiences the appropriate field strength for its particular design. Alternatively, the gain profile may be engineered to be relatively flat over a predetermined wavelength range. In another embodiment, our approach may be used to generate a function that compensates for a characteristic of another device. For example, our heterogeneous ISB device may be engineered to have a gain profile that compensates for the loss profile of another device. Alternatively, the gain/loss profile may be engineered to produce a nonlinear refractive index profile in our device that compensates for that of another device (e.g., an optical fiber).

    摘要翻译： 光学装置包括至少两个不同的子带间（ISB）光学子装置的叠层，其中各个ISB子装置的增益/损耗曲线相互适应或设计，以便产生预定的整体功能 组合。 我们将此组合设备定义为异构，因为并非所有的单个ISB子设备都是相同的。 示例性地，可能受该工程过程影响的各个ISB子设备的参数包括：与每个RT区域相关联的ISB光学跃迁（发射或吸收）的峰值能量，堆叠中每个子设备的位置 ; 这些ISB转换的振荡器强度; 每个过渡的能量带宽; 以及每个ISB子设备的RT和I / R区域的总长度。 在一个实施例中，我们的方法可以用于设计在多个不同波长处具有峰值的增益分布，从而实现多波长ISB光源，其中所施加的电场自身比例，使得每个单独的ISB子载波， 设备体验其特定设计的适当场强。 或者，增益分布可以被设计为在预定波长范围上相对平坦。 在另一个实施例中，我们的方法可以用于产生补偿另一设备的特性的功能。 例如，我们的异构ISB设备可以被设计为具有补偿另一设备的丢失简档的增益简档。 或者，增益/损耗曲线可以被设计为在我们的装置中产生非线性折射率分布，其补偿另一装置（例如，光纤）的折射率分布。

    Semiconductor laser for operation in librational modes
    17.
    发明授权
    Semiconductor laser for operation in librational modes 有权
    半导体激光器用于演示模式

    公开(公告)号：US06333944B1

    公开(公告)日：2001-12-25

    申请号：US09591716

    申请日：2000-06-12

    申请人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Deborah Lee Sivco ,  Evgueni E. Narimanov ,  Alfred Douglas Stone

    发明人： Federico Capasso ,  Alfred Yi Cho ,  Claire F. Gmachl ,  Deborah Lee Sivco ,  Evgueni E. Narimanov ,  Alfred Douglas Stone

    IPC分类号： H01S3083

    CPC分类号： H01S3/083

    摘要： A solid state laser comprises a cavity resonator in the form of a generally cylindrical body and, located within the resonator, an active region which generates lasing light when suitably pumped. The resonator has a relatively high effective refractive index (n>2 and typically n>3) is sufficiently deformed from circularity so as to support at least one librational mode (e.g., a V-shaped or a bow-tie mode, the latter being presently preferred for generating relatively high power, directional outputs). Specifically described is a Group III-V compound semiconductor, quantum cascade (QC), micro-cylinder laser in which the resonator has a flattened quadrupolar deformation from circularity. This laser exhibits both a highly directional output emission and a three-order of magnitude increase in optical output power compared to conventional semiconductor micro-cylinder QC lasers having circularly symmetric resonators.

    摘要翻译： 固体激光器包括呈大致圆柱形体形式的空腔谐振器，并且位于谐振器内部的有源区域，其在适当泵浦时产生激光。 谐振器具有相对较高的有效折射率（n> 2且通常n> 3）从圆形度充分变形，以便支持至少一种示范模式（例如，V形或蝴蝶结模式，后者为 目前优选用于产生相对高功率的方向输出）。 具体描述的是其中谐振器具有从圆形度的扁平四极变形的III-V族化合物半导体，量子级联（QC），微圆柱激光器。 与具有圆形对称谐振器的常规半导体微型气缸QC激光器相比，该激光器表现出高度方向性的输出发射和光输出功率三位数的增加。