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    • 1. 发明授权
    • Polarization maintaining fiber lasers and amplifiers
    • 极化保持光纤激光器和放大器
    • US6049415A
    • 2000-04-11
    • US986406
    • 1997-12-08
    • Stephen G. GrubbPaul FreemanStuart MacCormackRobert G. Waarts
    • Stephen G. GrubbPaul FreemanStuart MacCormackRobert G. Waarts
    • H01S3/067H01S3/23H01S3/10
    • H01S3/06758H01S3/0078H01S3/06712H01S3/0675H01S3/2316H01S3/2333
    • A number of variations are provided of a device that provides an amplified single polarization optical signal. Each of these relies on the use of a non-polarization maintaining gain medium through which the signal is directed, and a polarization shifter and reflector that direct the signal back through the same gain medium with a shifted polarization state. An input polarization beamsplitter directs the returning optical signal away to an output, based on its shifted polarization state. The embodiments of the invention include the use of double-clad fiber. Multiple stages may be used to provide specific amplification parameters. In one embodiment, both amplification stages reside in the same polarization shifting optical path. A polarization maintaining amplifier of this type may be used as part of a master oscillator-power amplifier, in which polarization maintaining fiber is used as part of the source laser. Wavelength selective components are also used in certain embodiments of the invention, to allow for wavelength selectivity, as well as a single polarization state, in amplifiers, lasers and amplified spontaneous emission (ASE). In one embodiment, an optical circulator is used to allow the amplified, shifted polarization state signals to be directed away from the input to a desired output port. A feedback loop may also be used to control the polarization state at the amplifier output. A polarization beamsplitter at the output directs light not having the desired polarization state to a photodetector, the output of which is used by a polarization controller at the input, such that the input polarization state is adjusted until the control signal from the photodetector is minimized.
    • 提供了一种提供放大的单偏振光信号的装置的变型。 这些都依赖于使用信号引导的非偏振维持增益介质,以及偏振移动器和反射器,其将信号反向通过具有偏移偏振状态的相同增益介质。 输入偏振分束器基于其移动的偏振状态将返回光信号导向输出。 本发明的实施例包括使用双包层光纤。 可以使用多个阶段来提供特定的扩增参数。 在一个实施例中,两个放大级位于相同的偏振移位光路中。 这种类型的偏振保持放大器可以用作主振荡器功率放大器的一部分,其中使用偏振保持光纤作为源激光器的一部分。 在本发明的某些实施例中也使用波长选择性分量,以便在放大器,激光器和放大的自发发射(ASE)中允许波长选择性以及单个极化状态。 在一个实施例中,光环行器用于允许放大的偏移偏振状态信号被引导离开输入到期望的输出端口。 还可以使用反馈回路来控制放大器输出端的极化状态。 输出处的偏振分束器将不具有期望的偏振状态的光引导到光电检测器,其输出由偏振控制器在输入端使用,使得输入偏振状态被调整直到来自光电检测器的控制信号最小化。
    • 2. 发明授权
    • Polarization maintaining fiber lasers and amplifiers
    • 极化保持光纤激光器和放大器
    • US06282016B1
    • 2001-08-28
    • US09452250
    • 1999-12-01
    • Stuart MacCormackRobert G. WaartsPaul FreemanStephen G. Grubb
    • Stuart MacCormackRobert G. WaartsPaul FreemanStephen G. Grubb
    • H01S300
    • H01S3/06758H01S3/0078H01S3/06712H01S3/0675H01S3/2316H01S3/2333
    • A number of variations are provided of a device that provides an amplified single polarization optical signal. Each of these relies on the use of a non-polarization maintaining gain medium through which the signal is directed, and a polarization shifter and reflector that direct the signal back through the same gain medium with a shifted polarization state. An input polarization beamsplitter directs the returning optical signal away to an output, based on its shifted polarization state. The embodiments of the invention include the use of double-clad fiber. Multiple stages may be used to provide specific amplification parameters. In particular, a fiber with a relatively large mode field diameter may be used to enable high pulse power applications. Wavelength selective components are used in certain embodiments of the invention, to allow for wavelength selectivity, as well as a single polarization state, in amplifiers, lasers and amplified spontaneous emission (ASE).
    • 提供了一种提供放大的单偏振光信号的装置的变型。 这些都依赖于使用信号引导的非偏振维持增益介质,以及偏振移位器和反射器,其将信号通过具有偏移偏振状态的相同增益介质引导回来。 输入偏振分束器基于其移动的偏振状态将返回光信号导向输出。 本发明的实施例包括使用双包层光纤。 可以使用多个阶段来提供特定的扩增参数。 特别地,可以使用具有相对大的模场直径的光纤来实现高脉冲功率应用。 在本发明的某些实施例中使用波长选择性分量,以便在放大器,激光器和放大的自发发射(ASE)中允许波长选择性以及单个极化状态。
    • 5. 发明申请
    • TROLLEY
    • 手推车
    • US20120013105A1
    • 2012-01-19
    • US13260208
    • 2010-02-02
    • Paul FreemanPhilip Fisher
    • Paul FreemanPhilip Fisher
    • B62B3/02
    • B62B3/027B62B3/106
    • A Folding shopping trolley [1] having an upper section [11] and a base section [2] adapted to move between a collapsed condition into a deployed condition is disclosed. The upper section [11] connects to the base section [2] via elongate support members [20] through an intermediate coupling [10] such that the upper section [11] and base section [2] can move in a synchronized condition between deployed and collapsed conditions. The base section [2] comprises ground engaging wheels [47 and 48] fixed to the lower end of the elongate support member [20]. The lower end of the elongate support members [20] are pivotly connected to the lower end [9] of the actuator [7] via the inner connecting members [6] forming a geometric arrangement with the outer connecting members [5] wherein vertical movement of the actuator [7] moves the trolley from the collapsed condition to the deployed condition. The outer connecting members [5] include a locking mechanism [30] to lock the trolley [1] in the deployed position. The actuator is free to move within a sleeve [14] which is fixed to the coupling [10]. The outer connecting members [5] and the inner connecting members [6] support a fabric tray [35]. The upper section contains handles [21] and corner bag supports [25]. The four triangular shopping bags [23] are provided with stiffening elements [24] the ends of which engage with corner supports [25]. The upper inner edge [45] of the bag [23] is provided with a cutout [46] which engages with the hook [40]. The shopping bags [23] are removable from the corner supports [25] and the center hook [40] by grasping the strap [44] and the stiffening device [24] at the cutout [26].
    • 公开了一种具有上部部分[11]和适于在折叠状态之间移动到部署状态的基部部分[2]的折叠式购物手推车[1]。 上部部分[11]通过中间联接件[10]通过细长的支撑构件[20]连接到基部[2],使得上部部分[11]和基部部分[2]可以在部署 和崩溃的条件。 基部[2]包括固定到细长支撑构件[20]的下端的接地轮[47和48]。 细长支撑件[20]的下端通过与外部连接件[5]形成几何布置的内部连接件[6]枢轴连接到致动器[7]的下端[9],其中垂直运动 执行器[7]将手推车从折叠状态移动到展开状态。 外连接件[5]包括锁定机构30,以将手推车[1]锁定在展开位置。 致动器可以在固定到联轴器[10]的套筒[14]内自由移动。 外连接构件[5]和内连接构件[6]支撑织物托盘[35]。 上部包含手柄[21]和角落袋支架[25]。 四个三角形购物袋[23]设置有加强元件[24],其端部与角支撑件接合[25]。 袋[23]的上内边缘[45]设置有与钩[40]接合的切口[46]。 通过抓住切口[26]上的带子[44]和加强装置[24],购物袋[23]可从角支撑件[25]和中心钩[40]移除。
    • 9. 发明授权
    • Trolley
    • 手推车
    • US08523219B2
    • 2013-09-03
    • US13260208
    • 2010-02-02
    • Paul FreemanPhilip Fisher
    • Paul FreemanPhilip Fisher
    • B62B1/00
    • B62B3/027B62B3/106
    • A trolley having a base section with ground engaging parts adapted to move between a collapsed condition into a deployed condition to provide a stable base for the trolley, the ground engaging parts are interconnected for synchronised movement and an upper section that connectively extends above the base section including a coupling intermediate the upper section and base section such that the upper section and base section have synchronised movement and an actuator operatively connected thereto, wherein the motion of the actuator causes the ground engaging parts to move between the collapsed and deployed condition.
    • 具有基部的手推车具有地面接合部分,其适于在折叠状态之间移动到展开状态以为手推车提供稳定的基座,地面接合部分互连用于同步运动,并且上部部分在基部上方连接地延伸 包括在上部和底部之间的耦合,使得上部和底部具有同步的运动和与其可操作地连接的致动器,其中致动器的运动导致地面接合部在折叠和展开状态之间移动。