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    • 19. 发明授权
    • Nonlinear optical switch
    • 非线性光开关
    • US6049642A
    • 2000-04-11
    • US947937
    • 1997-10-09
    • Shigeru NakamuraKazuhito Tajima
    • Shigeru NakamuraKazuhito Tajima
    • G02F1/35G02F2/00H04Q11/00G02B6/35
    • G02F1/3515G02F2/004H04Q11/0003
    • An optically controlled optical switch operating at a high speed and at a high efficiency can be realized with a simple construction. An optical signal exiting from a nonlinear optical waveguide is passed through an optical frequency filter and then guided into an optical output signal port. The optical frequency filter is a band-pass filter for passing only optical signal pulses having a center frequency of .omega.1. Where the center frequency .omega.0 of controlling light is set within the absorption region of the nonlinear optical waveguide, optical controlling pulses are absorbed, and carriers are excited. This results in a change in the refractive index. Consequently, the center frequency .omega.1 of only the optical signal pulses entered simultaneously with the optical controlling pulses is shifted to .omega.2. The optical frequency filter blocks optical signal pulses whose center frequency has been shifted to .omega.2. Thus, a gate-type optical switching action is accomplished.
    • 可以以简单的结构实现高速且高效率的光控光开关。 从非线性光波导出射的光信号通过光频滤波器,然后被引导到光输出信号端口。 光频滤波器是用于仅通过中心频率为ω1的光信号脉冲的带通滤波器。其中控制光的中心频率ω0设置在非线性光波导的吸收区域内,光控制脉冲被吸收 ,运营商兴奋不已。 这导致折射率的变化。 因此,仅与光控制脉冲同时输入的光信号脉冲的中心频率ω1移动到ω2。光频滤波器阻挡其中心频率已经移动到ω2的光信号脉冲。因此,门型 实现了光切换动作。