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    High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication system
    64.
    发明授权
    High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication system 有权
    高功率，可靠的光纤泵浦系统，具有高冗余度用于光波通信系统

    公开(公告)号：US06356574B1

    公开(公告)日：2002-03-12

    申请号：US09240361

    申请日：1999-01-29

    申请人： Richard R. Craig ,  Robert L G. Waarts ,  David F. Welch ,  John G. Endriz ,  Dirk J. Kuizenga ,  Steven Sanders

    发明人： Richard R. Craig ,  Robert L G. Waarts ,  David F. Welch ,  John G. Endriz ,  Dirk J. Kuizenga ,  Steven Sanders

    IPC分类号： H01S30933

    CPC分类号： H01S3/094003 ,  H01S3/09408 ,  H01S3/2383 ,  H01S5/4025 ,  H01S5/4031

    摘要： A multistage optical amplifier pumping system with built-in redundant reliability for lightwave communication system provides plural levels of redundancy. A first level of redundancy deals with redundancy in the form of plural primary laser diode sources for pumping a single fiber laser pump source. A second level of redundancy deals with redundancy of a plurality of fiber laser pump sources for pumping a plurality of serially connected injection signal fiber amplifiers forming the multistage amplifier system. If one of fiber pump sources should fail, increased pumping power is available from the remaining fiber pump sources via their respectively connected amplifier stages. A third level of redundancy deals with redundancy in the employment of multiple single mode laser emitters on the same chip or bar sufficiently segmented and/or electrical isolated so as not to interfere with operation of or cause failure to adjacent or neighboring emitters on the same chip or bar.

    摘要翻译： 具有光波通信系统内置冗余可靠性的多级光放大器泵浦系统提供多级冗余。 第一级冗余处理用于泵浦单个光纤激光泵源的多个主激光二极管源的形式的冗余。 第二级冗余处理多个光纤激光泵浦源的冗余，用于泵浦形成多级放大器系统的多个串联连接的注入信号光纤放大器。 如果光纤泵浦源之一失效，则剩余的光纤泵浦源通过其分别连接的放大器级可以提供增加的泵浦功率。 第三级冗余处理在同一芯片或条上使用多个单模激光发射器的冗余，该芯片或条具有足够的分段和/或电隔离，以免干扰相同芯片上相邻或相邻发射器的操作或引起故障 或酒吧。

    Double-clad optical fiber with improved inner cladding geometry
    68.
    发明授权
    Double-clad optical fiber with improved inner cladding geometry 失效
    双包层光纤具有改进的内包层几何形状

    公开(公告)号：US6157763A

    公开(公告)日：2000-12-05

    申请号：US050386

    申请日：1998-03-30

    申请人： Stephen G. Grubb ,  David F. Welch

    发明人： Stephen G. Grubb ,  David F. Welch

    IPC分类号： G02B6/036 ,  H01S3/067 ,  G02B6/22

    CPC分类号： G02B6/03622 ,  H01S3/06708 ,  H01S3/06729

    摘要： A double-clad optical fiber has an inner cladding with a cross-sectional shape that is non-circular, but that maintains a good end-coupling profile. The cross-sectional shape of the inner cladding is such that two perpendicular distances across the shape, each of which passes through a geometric center of a core of the fiber, are equal for all angular positions. Thus, while mode mixing within the inner cladding is enhanced, the inner cladding does not suffer any oblong distortions of its shape, and is therefore more easily coupled to conventional fibers. The cross-sectional cladding shape may include various regions along its outer surface that do not conform to a circular geometry about a center of the core. These regions may include flat regions, or concave or convex regions. The overall cross-sectional shape of the inner cladding may also be octagonal or star-shaped. In an alternative embodiment of the invention, the inner cladding may have a circular cross section, but has a torsional stress induced within it during manufacture. By rotating the fiber preform prior to curing of the inner cladding layer, a physical stress may be permanently imparted to the inner cladding which interacts with pump energy within the inner cladding layer to encourage mode mixing.

    摘要翻译： 双包层光纤具有内包层，其截面形状为非圆形，但是保持良好的端耦合曲线。 内包层的横截面形状使得跨越形状的两个垂直距离通过纤维的芯的几何中心，对于所有角度位置是相等的。 因此，当在内包层内的模式混合被增强时，内包层不会遭受其形状的任何长方形变形，因此更容易地耦合到常规的纤维。 横截面包层形状可以包括沿着其外表面的不符合围绕芯的中心的圆形几何形状的各种区域。 这些区域可以包括平坦区域或凹或凸区域。 内包层的整个横截面形状也可以是八边形或星形。 在本发明的替代实施例中，内包层可以具有圆形横截面，但在制造期间具有在其内引起的扭转应力。 通过在内包层固化之前旋转纤维预制件，物理应力可以永久地施加到与包层内的泵浦能量相互作用的内包层，以促进模式混合。

    Method and apparatus for detecting the presence and location of an object in a field
    70.
    发明授权
    Method and apparatus for detecting the presence and location of an object in a field 失效
    用于检测场中物体的存在和位置的方法和装置

    公开(公告)号：US5493112A

    公开(公告)日：1996-02-20

    申请号：US487409

    申请日：1995-06-07

    申请人： David F. Welch

    发明人： David F. Welch

    IPC分类号： F41J5/02 ,  G01S17/00 ,  G01S17/89 ,  G01V8/18 ,  G01V8/26 ,  H01J40/14

    CPC分类号： G01V8/26 ,  F41J5/02 ,  G01S17/00 ,  G01S17/89 ,  G01V8/18

    摘要： An optical system and method for detecting the presence and location of at least one stationary or moving object in a field. The optical system has at least one light source to generate a beam, which beam is scanned by at least one first reflecting surface to generate a plurality of beams. The beams are overlapped across the field by at least one second reflecting surface and their intensity is measured by at least one detection means.

    摘要翻译： 一种用于检测场中至少一个静止或移动物体的存在和位置的光学系统和方法。 光学系统具有至少一个光源以产生光束，该光束被至少一个第一反射表面扫描以产生多个光束。 光束通过至少一个第二反射表面在场上重叠，并且它们的强度由至少一个检测装置测量。