公开(公告)号：US4923290A

公开(公告)日：1990-05-08

申请号：US232741

申请日：1988-08-16

申请人： Ernst Brinkmeyer ,  Wolfgang Brennecke ,  Rainer J. R. W. Otto

发明人： Ernst Brinkmeyer ,  Wolfgang Brennecke ,  Rainer J. R. W. Otto

IPC分类号： G02F1/03 ,  G02B27/28 ,  G02F1/01

CPC分类号： G02F1/0136 ,  G02F1/0134

摘要： The invention relates to a polarization scrambler comprising a controllable optical phase retardation element for retarding with respect to one another components of a light beam with a different state of polarization, the light beam propagating through the element, and a control arrangement for controlling the phase retardation element, said control arrangement being adapted to supply a control signal so that as a function of time the phase retardation is controlled in such a way that with a given state of polarization (SOP) of the light entering the polarization scrambler varying states of polarization occur at its output in such a way that, averaged in time, the light intensities emerging in each SOP are at least substantially equal. An arrangement suitable for arbitrary input states of polarization is obtained when at least a further controllable phase retardation element (2, 3) connected to a control arrangement and succeeding the first element in the light propagation direction is provided which, represented on the Poincare sphere, creates states of polarization in accordance with a rotational axis which is different from that associated with the first phase retardation element and in that the phase retardation elements (1, 2, 3 ) are controlled by the control arrangement at different frequencies (f.sub.1, f.sub.2, f.sub.3) or in an uncorrelated aperiodical manner.

摘要翻译： 本发明涉及一种偏振扰乱器，其包括可控光学相位延迟元件，用于相对于具有不同偏振态的光束的彼此分量进行延迟，光束传播通过元件，以及用于控制相位延迟的控制装置 所述控制装置适于提供控制信号，使得随着时间的推移，相位延迟被控制为使得进入偏振加扰器的光的偏置的给定状态（SOP）发生在极化状态变化状态 其输出方式使得在每个SOP中出现的光强度在时间上平均至少基本相等。 当在Poincaré球上表示至少一个连接到控制装置并在光传播方向上连接第一元件的可控相位延迟元件（2,3）时，可以获得适合于任意输入偏振状态的装置， 根据不同于与第一相位延迟元件相关联的旋转轴产生偏振状态，并且相位延迟元件（1,2,3）由控制装置在不同频率（f1，f2， f3）或以不相关的非周期性方式。

公开(公告)号：US4958896A

公开(公告)日：1990-09-25

申请号：US267158

申请日：1988-11-04

申请人： Ernst Brinkmeyer ,  Manfred Fuchs ,  Wolfgang Brennecke ,  Wilhelm Dargatz

发明人： Ernst Brinkmeyer ,  Manfred Fuchs ,  Wolfgang Brennecke ,  Wilhelm Dargatz

IPC分类号： G01M11/00 ,  G02B6/32 ,  G02B6/36 ,  G02B6/42 ,  G02F1/33

CPC分类号： G02F1/33 ,  G01M11/3172 ,  G02B6/32 ,  G02B6/4225 ,  G02B6/3652 ,  G02B6/4226

摘要： An optical multi-port element with an acousto-optical modulator (AOM) has at least two monomode optical waveguide connections, at one side thereof. The end surfaces of the waveguides disposed in the focal plane of a lens situated between the optical waveguides and the acousto-optical modulator. In order to obtain a construction which can be adjusted in a simple manner and which has low attenuation, with a small overall length, it is provided that at least one side of the AOM (1) a single lens (2,3,31) is disposed with its optical axis aligned to the transmission axis of the AOM (1), and that the optical wave-guides (4 to 6, 18 to 20 or 27,28) are disposed with their axes parallel to one another and spaced from the optical axis of the lens (2,3,31) in such a manner that parallel beams (14 to 17), leading from the lens (2,3,31) to the AOM (1), are directed to the active region of the AOM (1) at the Bragg angle to the optical axis.

摘要翻译： 具有声光调制器（AOM）的光学多端口元件在其一侧具有至少两个单模光波导连接。 布置在位于光波导和声光调制器之间的透镜的焦平面中的波导的端面。 为了获得可以以简单的方式调节并且具有低衰减的构造，具有小的总长度，设置AOM（1）的至少一侧是单个透镜（2,3,31） 被设置成其光轴与AOM（1）的透射轴对准，并且光波导（4至6,18至20或27,28）被布置成其轴线彼此平行并与 透镜（2,3,31）的光轴以从透镜（2,3,31）到AOM（1）引出的平行光束（14至17）指向有源区域 的AOM（1）以相对于光轴的布拉格角。

公开(公告)号：US5082368A

公开(公告)日：1992-01-21

申请号：US599253

申请日：1990-10-03

申请人： Manfred H. Fuchs ,  Wolfgang Hoppe ,  Friedrich-Karl Beckmann ,  Ernst Brinkmeyer ,  Wolfgang Brennecke

发明人： Manfred H. Fuchs ,  Wolfgang Hoppe ,  Friedrich-Karl Beckmann ,  Ernst Brinkmeyer ,  Wolfgang Brennecke

IPC分类号： G01M11/02 ,  G01M11/00 ,  G02B6/00 ,  G02F1/335

CPC分类号： G01M11/3109

摘要： Heterodyne optical time domain reflectometer (OTDR) for determining the attenuation behavior of a monomode waveguide (test waveguide) by measurement of the backscattered parts of light pulses transmitted in said waveguide. An acousto-optic modulator (AOM) which deflects the transmission beam from a laser into the waveguide to be tested at a light frequency which is modulated with the acoustic frequency when the AOM is acoustically energized in a pulse mode. The light pulses backscattered from the test waveguide are superimposed on a local oscillator beam (LO) constituted by the laser beam which traverses the AOM when the AOM is not energized. The optical system losses are reduced in that the superposition is realized in a passive coupler, particularly a fibre coupler (10, 26).

摘要翻译： 用于通过测量在所述波导中传输的光脉冲的反向散射部分来确定单模波导（测试波导）的衰减特性的外差光学时域反射计（OTDR）。 一种声光调制器（AOM），其将传输光束从激光偏转到待测试的波导中，该光频在AOM以脉冲模式被声学激励时用声频调制。 从测试波导反向散射的光脉冲叠加在由AOM未通电时穿过AOM的激光束构成的本地振荡器束（LO）上。 降低光学系统损耗，因为在无源耦合器，特别是光纤耦合器（10,26）中实现叠加。