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    Quantum well infrared photo detector and monolithic chopper
    3.
    发明授权
    Quantum well infrared photo detector and monolithic chopper 失效
    量子阱红外光电探测器和单片斩波器

    公开(公告)号：US5661590A

    公开(公告)日：1997-08-26

    申请号：US465274

    申请日：1995-06-05

    申请人： Gilad Almogy ,  Amnon Yariv ,  Yuanjian Xu

    发明人： Gilad Almogy ,  Amnon Yariv ,  Yuanjian Xu

    IPC分类号： H01L31/0352 ,  G02F1/03

    CPC分类号： B82Y20/00 ,  H01L31/035236 ,  H01L31/035281 ,  Y02E10/50

    摘要： A quantum well infrared photodetector and modulator are monolithically integrated to one another. The infrared scene impinges on an infrared receiving element such as a phase grating, which couples it to a modulator. The modulator includes asymmetric quantum wells which are shifted by an applied bias. By appropriately adjusting the bias, the modulator can pass a maximum amount of the input information or can pass less. The photodetector and modulator both use the same kinds of materials, preferably GaAs and Al.sub.x Ga.sub.1-x As, so they essentially become a single unit, obtaining better noise and operating characteristics from the combination.

    摘要翻译： 量子阱红外光电检测器和调制器彼此整体地集成。 红外场景照射在诸如相位光栅的红外接收元件上，将其耦合到调制器。 调制器包括通过施加的偏置偏移的非对称量子阱。 通过适当调整偏置，调制器可以传递最大量的输入信息或者可以传递更少的输入信息。 光电检测器和调制器都使用相同种类的材料，优选为GaAs和Al x Ga 1-x As，因此它们基本上变成单个单元，从组合获得更好的噪声和操作特性。

    Er/Yb double clad photonic crystal fiber
    4.
    发明授权
    Er/Yb double clad photonic crystal fiber 有权
    Er / Yb双包层光子晶体光纤

    公开(公告)号：US07340140B1

    公开(公告)日：2008-03-04

    申请号：US11298737

    申请日：2005-12-09

    申请人： Yuanjian Xu ,  Francis S. Auricchio, Jr.

    发明人： Yuanjian Xu ,  Francis S. Auricchio, Jr.

    IPC分类号： G02B6/02 ,  G02B6/032 ,  G02B6/036

    CPC分类号： G02B6/02357 ,  G02B6/02323 ,  H01S3/06729 ,  H01S3/06741 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/09403 ,  H01S3/1608 ,  H01S3/1618

    摘要： In accordance with at least one embodiment of the present invention, a photonic crystal fiber apparatus includes a first cladding layer and a second cladding layer. The first cladding layer includes a plurality of photonic crystal rods disposed in an array along a longitudinal axis. The array has a separation between a first portion of the rods that defines a core region. A second portion of the photonic crystal rods is doped with two rare earth elements. The first cladding layer is configured to propagate signal light. The second cladding layer provides physical support for the plurality of photonic crystal rods and is configured to propagate pump light.

    摘要翻译： 根据本发明的至少一个实施例，光子晶体光纤装置包括第一包层和第二包层。 第一包层包括沿着纵向轴线设置成阵列的多个光子晶体棒。 该阵列在限定芯区域的杆的第一部分之间具有间隔。 光子晶体棒的第二部分掺杂有两个稀土元素。 第一包层被配置为传播信号光。 第二包层为多个光子晶体棒提供物理支撑，并且被配置为传播泵浦光。

    Low strain optical fiber coil and associated fiber optic gyroscope and method
    5.
    发明授权
    Low strain optical fiber coil and associated fiber optic gyroscope and method 有权
    低应变光纤线圈及相关光纤陀螺仪及方法

    公开(公告)号：US08958074B1

    公开(公告)日：2015-02-17

    申请号：US13595611

    申请日：2012-08-27

    申请人： Yuanjian Xu

    发明人： Yuanjian Xu

    IPC分类号： G01C19/72

    CPC分类号： G01C19/722

    摘要： An optical fiber coil including an optical fiber having a first end and a second end, the optical fiber including first, second, third and fourth segments, wherein the first segment is contiguous with the second segment, the second segment is contiguous with the third segment, and the third segment is contiguous with the fourth segment, and plural substantially planar layers stacked along a coil axis, the layers including a first planer layer formed from the first segment, a second planar layer formed from the second segment, a third planar layer formed from the third segment, and a fourth planar layer formed from the fourth segment, wherein the fourth planar layer is positioned between the first planar layer and the second planar layer, and wherein the second planer layer is positioned between the third planer layer and the fourth planar layer.

    摘要翻译： 一种光纤线圈，其包括具有第一端和第二端的光纤，所述光纤包括第一，第二，第三和第四段，其中所述第一段与所述第二段相邻，所述第二段与所述第三段连续 并且第三段与第四段相邻，并且沿着线圈轴堆叠多个基本上平面的层，这些层包括由第一段形成的第一平面层，由第二段形成的第二平面层，第三平面层 由第三段形成，第四平面层由第四段形成，其中第四平面层位于第一平面层和第二平面层之间，并且其中第二平面层位于第三平面层和第二平面层之间， 第四平面层。

    Method and apparatus for hermetically sealing fiber array blocks
    6.
    发明授权
    Method and apparatus for hermetically sealing fiber array blocks 有权
    用于密封光纤阵列块的方法和装置

    公开(公告)号：US06681473B1

    公开(公告)日：2004-01-27

    申请号：US10078066

    申请日：2002-02-15

    申请人： Bin Liu ,  R. Kehl Sink ,  David Welsh ,  Yuanjian Xu

    发明人： Bin Liu ,  R. Kehl Sink ,  David Welsh ,  Yuanjian Xu

    IPC分类号： G02B600

    CPC分类号： G02B6/3644 ,  G02B6/3676 ,  G02B6/3688 ,  G02B6/3692 ,  Y10T29/49885 ,  Y10T29/49982 ,  Y10T29/49993

    摘要： A method and apparatus hermetically sealing a fiber array block is described. In one embodiment, a fiber array plate is fabricated and an array of tapered holes formed therein. An adhering metal layer, such as a titanium, nickel and gold multilayer, is deposited upon the fiber array plate. A solder preform is positioned on the fiber array plate so that the array of holes in the solder preform corresponds to the array of holes in the array plate. Fibers having an adhering metal layer deposited thereon, are then inserted through the fiber array plate. The tapered holes make the fiber insertion process easier. The fiber array plate is then heated such that the solder preform melts causing the solder to fill any gaps between the fiber array plates and the fiber. When the solder cools a hermetic seal is formed while the fibers remain accurately positioned.

    摘要翻译： 描述了密封光纤阵列块的方法和设备。 在一个实施例中，制造了光纤阵列板，并且形成了一组锥形孔。 附着的金属层，例如钛，镍和金多层，沉积在纤维阵列板上。 焊料预制件位于纤维阵列板上，使得焊料预制件中的孔阵列对应于阵列板中的孔阵列。 然后将其上沉积有附着金属层的纤维插入穿过纤维阵列板。 锥形孔使纤维插入过程更容易。 然后加热纤维阵列板，使​​得焊料预制件熔化，导致焊料填充纤维阵列板和纤维之间的任何间隙。 当焊料冷却时，在纤维保持精确定位的同时形成气密密封。