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    • 6. 发明授权
    • Optical logic devices and methods
    • 光逻辑器件和方法
    • US5999283A
    • 1999-12-07
    • US858321
    • 1997-05-19
    • Kim Byron RobertsJames Edward Andrew WhiteawayMark Tait
    • Kim Byron RobertsJames Edward Andrew WhiteawayMark Tait
    • G02F1/35G02F2/00G02F3/00G02F1/035G02F27/00
    • G02F2/004G02F3/00G02F1/3517
    • An optical logic device is provided by an interferometer having an output which defines a logic state 1 or 0 in dependence upon an interference condition existing in the interferometer. Each arm of the interferometer contains a semiconductor optical amplifier in which the effect of cross phase modulation is utilized to modulate the phase of light transmitted through the respective arms. Optical signals are counter propagated through one or both of the arms in order to provide the cross modulation and thereby enable the interference condition to be set to one or other of the logic states. Automatic level control is provided at inputs to the interferometer and between successive stages of logic device. The method has application to high frequency digital optical communication systems where all optical logic operations are required.
    • 光学逻辑器件由具有根据存在于干涉仪中的干扰条件来定义逻辑状态1或0的输出的干涉仪提供。 干涉仪的每个臂包含半导体光放大器,其中利用交叉相位调制的作用来调制透过各个臂的光的相位。 光信号通过一个或两个臂进行反向传播,以提供交叉调制,从而使干扰条件能够被设置为一个或另一个逻辑状态。 在干涉仪的输入端和逻辑器件的连续级之间提供自动电平控制。 该方法适用于需要所有光逻辑运算的高频数字光通信系统。