公开(公告)号：US20020080466A1

公开(公告)日：2002-06-27

申请号：US09988377

申请日：2001-11-19

Applicant: ALCATEL

Inventor： Dominique Bayart ,  Jean-Louis De Bougrenet De La Tocnayes ,  Raymond Chevallier ,  Laurent Dupont

IPC: G02F001/00 ,  G02B026/00

CPC classification number: G02F1/1334 ,  G02F2201/305 ,  G02F2203/02 ,  G02F2203/055 ,  G02F2203/48

Abstract: A spatial light modulator (SLM) is made up of a cell filled with a liquid crystal (LC) based substance. Latter has a variable scattering property with respect to an electric field present in the cell. By using a plurality of electrodes in the direct vicinity of said cell, it is then possible to build an electric field inside it which will permit advantageously to modulate a continuous spectrum from optical signals transmitted through said cell. The different pass bands present in said continuous spectrum while at least few of them comprise at least a respective different wavelength will have to be transmitted through said cell at different regions. Latter will correspond to different values of the amplitude of scattering such to be adapted to modulate the respective different pass bands. Such SLM is used to build a dynamic spectral equalizer. Latter contains a spectral dispersive element placed on an optical path of an incident light beam. This spectral dispersive element will spread continuously said incident light beam onto said SLM such that at least each different wavelength present in said incident light beam are focused or imaged towards a different spatial region of said SLM.

Abstract translation: 空间光调制器（SLM）由填充有液晶（LC）的物质的单元组成。 后者相对于电池中存在的电场具有可变的散射特性。 通过使用在所述单元的直接附近的多个电极，则可以在其内部建立电场，其将有利地从通过所述单元传输的光信号调制连续的频谱。 存在于所述连续光谱中的不同通带，其中至少几个包含至少相应的不同波长的不同通带将必须在不同区域通过所述单元传输。 后者将对应于散射幅度的不同值，以适应于调制各自不同的通带。 这样的SLM用于构建动态频谱均衡器。 后者包含放置在入射光束的光路上的光谱色散元件。 该光谱色散元件将连续地将所述入射光束扩展到所述SLM上，使得存在于所述入射光束中的至少每个不同波长被聚焦或朝向所述SLM的不同空间区域成像。