公开(公告)号：US07010211B2

公开(公告)日：2006-03-07

申请号：US10657743

申请日：2003-09-05

Applicant: Gil Cohen

Inventor： Gil Cohen

IPC: G02B6/00

CPC classification number: G02F1/1326 ,  G02B6/266 ,  G02F1/0115 ,  G02F1/134309 ,  G02F1/1396 ,  G02F1/2955 ,  G02F2201/04 ,  G02F2201/17 ,  G02F2203/48

Abstract: A fiber optical attenuator utilizing the cut-off phenomenon for single mode propagation of an optical wave down a single mode fiber, comprising an element such as a pixelated liquid crystal element, capable of spatially changing the phase across the cross section of an input optical signal. Such a spatial phase change is equivalent to a change in the mode structure of the propagating wave. The signal propagating in the single mode output fiber is attenuated in accordance with the extent to which higher order modes are mixed into the low order mode originally present. When the mode is completely transformed to higher order modes, the wave is effectively completely blocked from entering the output single-mode fiber, and the attenuation is high. The level of attenuation is determined by the fraction of the wave which is converted to modes other than the lowest order mode, and is thus controllable by the voltage applied to the pixels of the liquid crystal element.

Abstract translation: 一种光纤衰减器，其利用用于单模光纤单模传播的截止现象的光纤衰减器，其包括诸如像素化液晶元件的元件，其能够在输入光信号的横截面上空间改变相位 。 这样的空间相位变化相当于传播波的模式结构的变化。 在单模输出光纤中传播的信号根据最初存在的低阶模式混合到高阶模式的程度而衰减。 当模式完全转换为高阶模式时，波被有效完全阻止进入输出单模光纤，衰减高。 衰减的水平由转换成除了最低阶模式之外的模式的波的分数确定，并且因此可以通过施加到液晶元件的像素的电压来控制。

公开(公告)号：US20040233940A1

公开(公告)日：2004-11-25

申请号：US10069533

申请日：2002-03-06

Inventor： Jean-Pierre Huignard ,  Arnaud Brignon

IPC: H01S003/30 ,  H01S003/091

CPC classification number: H01S3/067 ,  G02B6/04 ,  G02B6/2848 ,  G02B6/4206 ,  G02F1/0338 ,  G02F2201/04 ,  G02F2201/05 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/302

Abstract: A pumped-fiber laser comprising a multimode doped fiber (1) and a holographic spatial mode conversion device (3).

Abstract translation: 一种包括多模掺杂光纤（1）和全息空间模式转换装置（3）的泵浦光纤激光器。