利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

41 条记录 (耗时 0.034 秒)

    Semiconductor ring and folded cavity lasers
    1.
    发明授权
    Semiconductor ring and folded cavity lasers 失效
    半导体环和折叠腔激光器

    公开(公告)号：US5231642A

    公开(公告)日：1993-07-27

    申请号：US880681

    申请日：1992-05-08

    申请人： Donald R. Scifres ,  Kenneth M. Dzurko ,  Robert G. Waarts ,  David F. Welch ,  Amos Hardy ,  Stephen O'Brien

    发明人： Donald R. Scifres ,  Kenneth M. Dzurko ,  Robert G. Waarts ,  David F. Welch ,  Amos Hardy ,  Stephen O'Brien

    IPC分类号： H01S5/026 ,  H01S5/028 ,  H01S5/10 ,  H01S5/125 ,  H01S5/187 ,  H01S5/20 ,  H01S5/40 ,  H01S5/42 ,  H01S5/50

    CPC分类号： H01S5/1032 ,  H01S5/1071 ,  H01S5/20 ,  H01S5/423 ,  H01S5/026 ,  H01S5/028 ,  H01S5/1243 ,  H01S5/125 ,  H01S5/187 ,  H01S5/2036 ,  H01S5/4075 ,  H01S5/42 ,  H01S5/50

    摘要： A semiconductor laser that includes at least one grating reflector with a grating period selected to diffract at a nonperpendicular angle within the plane of the laser waveguide. This allows dispersal of laser light, eliminating filamentary multimode operation of broad area lasers. In one embodiment, the grating reflector couples light between a single transverse mode waveguide portion of the optical cavity and a second, broad area, portion that is not collinear with the single mode waveguide. In another embodiment, the cavity favors a ring mode of oscillation. One or more grating reflectors form part of the feedback mechanism which forms a resonant optical cavity with noncollinear portions. Other reflectors in the feedback mechanism include facet reflectors which can be cleaved or ion milled, or semiconductor material refractive index boundaries. Laser embodiments with two or more grating reflectors can be independently tuned to provide a high rate of amplitude modulation. Spatial beam deflection and wavelength tuning are also achieved. A stable unidirectional ring laser is also described. Multiple ring laser cavities can also be coupled together by partially reflecting grating reflectors to form a laser array.

    摘要翻译： 一种半导体激光器，其包括至少一个具有光栅周期的光栅反射器，所述光栅反射器被选择为在激光波导的平面内以非垂直角衍射。 这允许分散激光，消除广域激光器的丝状多模操作。 在一个实施例中，光栅反射器将光耦合在光腔的单个横模式波导部分与不与单模波导共线的第二宽区域部分之间耦合。 在另一个实施例中，空腔有利于环形振荡模式。 一个或多个光栅反射器形成反馈机构的一部分，其形成具有非共线部分的谐振光腔。 反馈机构中的其他反射器包括可以被切割或离子研磨的面反射器，或半导体材料的折射率边界。 具有两个或更多个光栅反射器的激光器实施例可以被独立地调谐以提供高的幅度调制率。 还实现了空间光束偏转和波长调谐。 还描述了稳定的单向环形激光器。 多环激光腔也可以通过部分反射光栅反射器耦合在一起形成激光阵列。

    NxN Optical crossbar switch matrix
    2.
    发明授权
    NxN Optical crossbar switch matrix 失效
    NxN光交叉开关矩阵

    公开(公告)号：US5255332A

    公开(公告)日：1993-10-19

    申请号：US915918

    申请日：1992-07-16

    申请人： David F. Welch ,  Donald R. Scifres ,  Robert G. Waarts ,  Amos A. Hardy ,  David G. Mehuys ,  Stephen O'Brien

    发明人： David F. Welch ,  Donald R. Scifres ,  Robert G. Waarts ,  Amos A. Hardy ,  David G. Mehuys ,  Stephen O'Brien

    IPC分类号： G02B6/28 ,  G02F1/017 ,  G02F1/313 ,  H04Q3/52 ,  H04Q11/00 ,  G02B6/36

    CPC分类号： B82Y20/00 ,  G02B6/2804 ,  G02B6/2848 ,  G02F1/313 ,  G02F1/017 ,  G02F2201/305

    摘要： An optical crossbar switch matrix for use in switching optical signals from a first set of optical fibers to a second set of optical fibers, in any order, which is characterized by having a matrix of rows and columns of diffraction gratings formed in a semiconductor heterostructure. Each grating is independently biased with either a forward or reverse bias voltage to switch the grating between a reflective state and a transmissive state. The gratings are oriented at an angle relative to the rows and columns so that when the Bragg condition for the light received from an optical film is met, a portion of the light is diffracted from the row in which it is propagating into a column toward another optical fiber. The heterostructure may include optical amplifiers to restore the optical signal to its original power level. Beam expanding, collimating and focussing optics may also be integrated into the heterostructure.

    摘要翻译： 一种用于将光信号从第一组光纤切换到第二组光纤的光学交叉开关矩阵，其特征在于具有在半导体异质结构中形成的行和列的衍射光栅的矩阵。 每个光栅被独立地偏置有正向或反向偏置电压，以在反射状态和透射状态之间切换光栅。 光栅相对于行和列以一定角度取向，使得当满足从光学膜接收的光的布拉格条件时，光的一部分从其正在传播到列的行衍射成另一个 光纤。 异质结构可以包括将光信号恢复到其原始功率电平的光放大器。 光束扩展，准直和聚焦光学器件也可以整合到异质结构中。

    Differentially patterned pumped optical semiconductor gain media
    3.
    发明授权
    Differentially patterned pumped optical semiconductor gain media 失效
    差分图案泵浦光学半导体增益介质

    公开(公告)号：US5793521A

    公开(公告)日：1998-08-11

    申请号：US684786

    申请日：1996-07-22

    申请人： Stephen O'Brien ,  Alexander Schoenfelder ,  Robert J. Lang ,  Amos A. Hardy ,  Ross A. Parke ,  David F. Welch

    发明人： Stephen O'Brien ,  Alexander Schoenfelder ,  Robert J. Lang ,  Amos A. Hardy ,  Ross A. Parke ,  David F. Welch

    IPC分类号： H01S5/026 ,  H01S5/042 ,  H01S5/062 ,  H01S5/10 ,  H01S5/12 ,  H01S5/125 ,  H01S5/16 ,  H01S5/187 ,  H01S5/20 ,  H01S5/50 ,  H01S3/00

    CPC分类号： H01S5/026 ,  H01S5/0425 ,  H01S5/20 ,  H01S5/50 ,  H01S2301/163 ,  H01S2301/166 ,  H01S5/0267 ,  H01S5/0422 ,  H01S5/06243 ,  H01S5/1014 ,  H01S5/1053 ,  H01S5/1064 ,  H01S5/1085 ,  H01S5/12 ,  H01S5/125 ,  H01S5/16 ,  H01S5/187 ,  H01S5/2036 ,  H01S5/5018

    摘要： An optical gain medium comprising, for example, an optical semiconductor device which is differentially pumped and a master oscillator power amplifier (MOPA) device employing such an amplifier. The gain medium may have a linear stripe region or a diverging stripe region that allows the light propagating therein to diverge along at least part of its length, such as a flared or tapered amplifier having a gain region that increases in width toward its output at a rate that equals or exceeds the divergence of the light. The amplifier is pumped with a current density at its input end which is smaller than the current density used to pump the output end for maintaining coherence of the beam to high power levels employing differential pumping. Differential pumping may be both longitudinal and lateral within the amplifier and may be patterned to reduce the peak modal gain observed longitudinally along and/or laterally across the pumped stripe region of the gain medium so that he experienced modal gain of the propagating light is more balanced along the length of the stripe region, i.e., rendered significantly more uniform in distribution, providing for higher diffraction limited performance without optical filamentation formation.

    摘要翻译： 一种光增益介质，包括例如差分泵浦的光半导体器件和使用这种放大器的主振荡器功率放大器（MOPA）器件。 增益介质可以具有线性条纹区域或发散条纹区域，其允许其中传播的光沿着其长度的至少一部分发散，例如具有增大区域的扩张区域或锥形放大器，该增宽区域在宽度方向上朝向其输出端 等于或超过光的分歧。 放大器在其输入端以电流密度泵送，该电流密度小于用于泵浦输出端的电流密度，以便通过差分泵浦将光束的相干保持为高功率电平。 差分泵浦可以在放大器内纵向和横向两者，并且可以被图案化以减少在增益介质的泵浦条带区域沿纵向和/或横向观察到的峰值模态增益，使得他经历了传播光的模态增益更均衡 沿着条纹区域的长度，即在分布中显着地更均匀地提供，从而提供更高的衍射限制性能，而不需要光学成丝形成。

    Broad-area MOPA device with leaky waveguide beam expander
    4.
    发明授权
    Broad-area MOPA device with leaky waveguide beam expander 失效
    具有泄漏波导束扩展器的广域MOPA器件

    公开(公告)号：US5349602A

    公开(公告)日：1994-09-20

    申请号：US31684

    申请日：1993-03-15

    申请人： David G. Mehuys ,  Stephen O'Brien ,  David F. Welch

    发明人： David G. Mehuys ,  Stephen O'Brien ,  David F. Welch

    IPC分类号： G02B6/12 ,  G02B6/125 ,  G02B6/30 ,  H01S3/00 ,  H01S5/00 ,  H01S5/026 ,  H01S5/10 ,  H01S5/12 ,  H01S5/125 ,  H01S5/187 ,  H01S5/50 ,  H01S3/08

    CPC分类号： H01S5/026 ,  G02B6/12004 ,  G02B6/125 ,  G02B6/305 ,  H01S5/10 ,  H01S3/005 ,  H01S5/005 ,  H01S5/0264 ,  H01S5/1021 ,  H01S5/1215 ,  H01S5/125 ,  H01S5/187 ,  H01S5/50

    摘要： A coherent light source, such as a laser oscillator and a monolithic MOPA device, and a broad area light amplifying device, all characterized by having a leaky waveguide beam expander coupled thereto for expanding a single mode beam into a wide light beam in a coherent manner. The beam expander comprises an elongated antiguide core of a first refractive index and a radiated-wave receiving region of a higher refractive index to receive lightwaves laterally radiated from the antiguide core. This beam expander can be located at an output end of a single mode laser oscillator to receive and expand the beam, at an input end of a broad area optical power amplifier to allow the amplifier to accept a narrow input beam, or between the laser oscillator and power amplifier in a MOPA device. The beam expander elements can also be located partially or entirely within the resonant optical cavity of a laser oscillator.

    摘要翻译： 相干光源，例如激光振荡器和单片MOPA器件，以及广域光放大器件，其特征在于具有耦合到其上的泄漏波导束扩展器，用于以一致的方式将单模光束扩展成宽光束 。 光束扩展器包括具有第一折射率的细长防反射芯和较高折射率的辐射波接收区，用于接收从抗磁核心横向辐射的光波。 该光束扩展器可以位于单模激光振荡器的输出端，以在广域光功率放大器的输入端处接收和扩展光束，以允许放大器接受窄输入光束，或激光振荡器 和功率放大器在MOPA设备。 光束扩展器元件也可以部分地或完全地位于激光振荡器的谐振光学腔内。

    Stepped etalon
    7.
    发明授权
    Stepped etalon 有权
    阶梯标准

    公开(公告)号：US06246480B1

    公开(公告)日：2001-06-12

    申请号：US09388345

    申请日：1999-09-01

    申请人： Stephen O'Brien

    发明人： Stephen O'Brien

    IPC分类号： G01B0902

    CPC分类号： G02B5/284 ,  G01J3/26 ,  G01J9/02

    摘要： An improved stepped etalon comprises a transparent body having a stepped surface. Adjacent step lands are separated from each other by a transition region which includes a curved, waved, or otherwise varied step wall such that the average height of the stepped surface does not change abruptly in the transition region from the height of one land to another, but instead varies gradually according to the particular shape of the step wall. In an alternative embodiment, the step transition is formed using a grey-scale or half-tone patterning in which the average height gradually varies across the transition region. The non-planar transition region reduces the amount of coherent interference caused by the step transition thereby reducing the dead spot behind the step transition portions where interference prevents accurate measurements of light transmission from being made.

    摘要翻译： 改进的台阶式标准具包括具有台阶表面的透明体。 相邻台阶台肩通过包括弯曲，波形或其他变化的台阶壁的过渡区域彼此分开，使得台阶表面的平均高度在过渡区域中不会从一个地面的高度突然变化到另一个台阶， 而是根据台阶壁的特定形状逐渐变化。 在替代实施例中，使用其中平均高度在过渡区域上逐渐变化的灰度级或半色调图案形成阶跃转换。 非平面过渡区域减少由阶跃转变引起的相干干扰量，从而减少步进过渡部分后面的死点，其中干扰阻止光透射的精确测量。

    Universal fan for motor vehicle heat exchanger
    9.
    发明申请
    Universal fan for motor vehicle heat exchanger 有权

    公开(公告)号：US20070095511A1

    公开(公告)日：2007-05-03

    申请号：US11591833

    申请日：2006-11-02

    申请人： Stephen O'Brien

    发明人： Stephen O'Brien

    IPC分类号： B60H1/00

    CPC分类号： B60H1/00328 ,  B60H1/00464

    摘要： A cooling system assembly for a vehicle includes a heat exchanger with a plurality of fins for the transfer of heat to air passing therebetween. The heat exchanger has a pre-selected length, width, and thickness such that the heat exchanger fits adjacent an engine of the vehicle. A plurality of fan assemblies are positioned adjacent each other and juxtaposed the heat exchanger so that the fan assemblies cause air to travel across the fins when the fan assemblies are operating. Mounting brackets protrude from a periphery of each of the fan assemblies. Each of the mounting brackets has a set of ratchet grooves formed thereon and a bore extending therethrough. A bracket member is associated with each of the plurality of mounting brackets that connects the mounting bracket to either the heat exchanger or to one of the mounting brackets of the other fan assembly.

    Method of preparation of biomagnetic nanoparticles coated with a noble metal layer
    10.
    发明申请
    Method of preparation of biomagnetic nanoparticles coated with a noble metal layer 审中-公开
    用贵金属层涂覆的生物磁纳米颗粒的制备方法

    公开(公告)号：US20060140868A1

    公开(公告)日：2006-06-29

    申请号：US11156740

    申请日：2005-06-20

    申请人： Stephanie Grancharov ,  Stephen O'Brien ,  Glenn Held ,  Christopher Murray

    发明人： Stephanie Grancharov ,  Stephen O'Brien ,  Glenn Held ,  Christopher Murray

    IPC分类号： A61K49/06 ,  A61K9/28

    CPC分类号： B82Y5/00 ,  A61K9/0009 ,  A61K49/183 ,  H01F1/0054

    摘要： A method for the preparation of magnetic nanoparticles coated with a noble metal is described. The method includes providing a first mixture containing a first non-polar organic solvent and uncoated magnetic nanoparticles. The first mixture is mixed with a second mixture containing a second non-polar organic solvent and ions comprising the noble metal to form a third mixture. The third mixture is mixed with an organic ligand or a fourth mixture containing an organic ligand to form a fifth mixture. The fifth mixture is reacted with a sixth mixture containing a reducing agent to form a seventh mixture containing the monodispersed magnetic nanoparticles coated with the noble metal. The monodispersed magnetic coated nanoparticles may be separated from the seventh mixture by adding a polar organic solvent or a mixture of polar organic solvents in which the nanoparticles are insoluble.

    摘要翻译： 描述了制备用贵金属涂覆的磁性纳米颗粒的方法。 该方法包括提供含有第一非极性有机溶剂和未涂覆的磁性纳米颗粒的第一混合物。 将第一混合物与含有第二非极性有机溶剂的第二混合物和包含贵金属的离子混合以形成第三混合物。 将第三混合物与有机配体或含有机配体的第四混合物混合以形成第五混合物。 将第五混合物与含有还原剂的第六混合物反应，形成包含用贵金属涂覆的单分散磁性纳米颗粒的第七混合物。 可以通过加入极性有机溶剂或其中纳米颗粒不溶的极性有机溶剂的混合物将单分散磁性涂覆的纳米颗粒与第七混合物分离。