公开(公告)号：US5594820A

公开(公告)日：1997-01-14

申请号：US385477

申请日：1995-02-08

申请人： Philip M. Garel-Jones ,  Murray R. Harman ,  Timothy P. Cutts

发明人： Philip M. Garel-Jones ,  Murray R. Harman ,  Timothy P. Cutts

IPC分类号： G02B6/35 ,  G02B6/38 ,  G02B6/26 ,  G02B6/42

CPC分类号： G02B6/352 ,  G02B6/355 ,  G02B6/358

摘要： An opto-mechanical switch suitable for use in optical telecommunications systems comprises an input port and two output ports interconnected by an optical path, an optical element and an actuation mechanism for moving the optical element relative to the optical path so as to change coupling of light beams between the input port and the output ports. The optical element is supported by a flexible suspension unit comprising a pair of mutually-spaced twin elongate flexures. Each of the pair of flexures is attached at one end to an anchorage and at its other end to a mounting for optical element. The flexures are identical in length and flexibility and are spaced apart in the direction of displacement of the optical element. In use, when the actuator displaces the optical element, the flexures flex in common in the direction of displacement of the optical element. The optical element may be an optical fiber, a mirror, a prism, and so on. The twin flexures obviate the need for precision sliding surfaces which assures greater dependability, especially in switches which are used very infrequently, such as routing switches for re-routing traffic around a failed local station in a ring architecture system.

摘要翻译： 适用于光通信系统的光机械开关包括通过光路互连的输入端口和两个输出端口，光学元件和用于相对于光路移动光学元件的致动机构，以便改变光的耦合 输入端口和输出端口之间的光束。 光学元件由包括一对相互间隔开的双伸长弯曲物的柔性悬挂单元支撑。 一对弯曲部中的每一个在一端附接到锚固件，并且在另一端附接到用于光学元件的安装件。 弯曲部的长度和柔性相同，并且在光学元件的位移方向上间隔开。 在使用中，当致动器移动光学元件时，挠曲件在光学元件的位移方向上共同弯曲。 光学元件可以是光纤，反射镜，棱镜等。 双重弯曲消除了对精确滑动表面的需求，确保更高的可靠性，特别是在非常频繁使用的开关中，例如用于在环形架构系统中绕故障本地站重新路由流量的路由交换机。

公开(公告)号：US5481402A

公开(公告)日：1996-01-02

申请号：US199793

申请日：1994-02-22

申请人： Yihao Cheng ,  Timothy P. Cutts ,  Gary S. Duck ,  Carey M. Garrett

发明人： Yihao Cheng ,  Timothy P. Cutts ,  Gary S. Duck ,  Carey M. Garrett

IPC分类号： G02B5/28 ,  G02B5/30 ,  G02B6/26 ,  G02B6/34 ,  G02B7/00 ,  G02F1/21

CPC分类号： G02B5/285 ,  G02B26/007 ,  G02B5/30 ,  G02B6/2706 ,  G02B6/29361 ,  G02B6/29395 ,  G02B6/2746 ,  G02B6/2793

摘要： An tunable optical filter of the kind used, for example, in wavelength-division multiplexing (WDM) optical communication systems and tunable source applications, has an interference filter element which is pivotable to adjust the operating wavelength of the filter. In order to reduce polarization dependency as the angle of the interference filter element changes, the light beam to be filtered is passed through the filter element twice, the second time with its polarization state shifted, specifically orthogonal, relative to the polarization state during the first pass. As a result, polarization dependent effects are equalized. The optical filter comprises a pivotally mounted filter element, an input optical fiber for directing a light beam to be filtered through the filter element in a first direction with a first polarization state, optical elements for rotating the polarization state of the filtered light beam and returning the light beam through the filter element (10) a second time, and an output optical fiber for receiving the light beam following passage of the light beam though the filter element the second time. The optical elements may comprise a reflector for reflecting a light beam emerging from the optical filter element to return through the optical filter element in the opposite direction, and a polarization rotator, such as a quarter-wave plate or a Faraday rotator, for rotating the polarization state of the light beam through 90 degrees before passage in the opposite direction.

摘要翻译： 例如在波分多路复用（WDM）光通信系统和可调源应用中使用的类型的可调光滤波器具有可以枢转的调谐滤波器的工作波长的干涉滤光元件。 为了在干涉滤光元件的角度变化时减小偏振依赖性，要滤波的光束通过滤光元件两次，其第二次偏振态相对于第一次的偏振态偏移，具体地是正交的 通过。 结果，使偏振相关效应相等。 光学滤波器包括枢轴安装的滤波器元件，用于沿第一极化状态的第一方向引导要滤波通过滤光元件的光束的输入光纤，用于旋转滤光片的偏振状态的光学元件并返回 第二次通过滤光元件（10）的光束;以及输出光纤，用于在第二次通过滤光元件之后接收通过光束的光束。 光学元件可以包括反射器，用于反射从光学滤光器元件出射的光束，以沿相反方向返回穿过滤光器元件，以及偏振旋转器，例如四分之一波片或法拉第旋转器，用于旋转 在相反方向通过之前，光束的极化状态通过90度。

公开(公告)号：US5546180A

公开(公告)日：1996-08-13

申请号：US498878

申请日：1995-07-06

申请人： Philip M. Garel-Jones ,  Timothy P. Cutts

发明人： Philip M. Garel-Jones ,  Timothy P. Cutts

IPC分类号： G01M11/00 ,  G02B6/35 ,  G01N21/84 ,  G02B6/34 ,  G02B26/08

CPC分类号： G02B6/3524 ,  G01M11/3154 ,  G02B6/3528 ,  G02B6/3556 ,  G02B6/358 ,  G02B6/3582

摘要： A method and apparatus is provided for injecting an optical test pulse mid-stream into an optical path to be tested by providing a switch that in normal transmitting and receiving of data includes two lenses separated by a gap. Data is usually transmitted across the gap from one lens to the other. In a test mode where OTDR is to be performed, a prism functioning in a similar manner to a periscope is moved into the gap between the lenses to couple/inject a test pulse into one of the lenses. An arrangement is described wherein either side of transmission line on either side of the gap can be tested.

摘要翻译： 提供了一种方法和装置，用于通过提供在正常的数据传输和接收中包括由间隙分开的两个透镜的开关将光学测试脉冲中流注入要测试的光路中。 数据通常从一个透镜到另一个透镜的间隙传输。 在要执行OTDR的测试模式中，以与潜望镜类似的方式起作用的棱镜被移动到透镜之间的间隙中以将测试脉冲耦合/注入到其中一个透镜中。 描述了可以测试间隙两侧的传输线的任一侧的布置。