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    • 30. 发明专利
    • Multichannel optical switch and its driving method
    • 多通道光开关及其驱动方法
    • JPS58215632A
    • 1983-12-15
    • JP9882082
    • 1982-06-09
    • Nec Corp
    • KONDOU MITSUKAZU
    • G02B6/12G02F1/31G02F1/313G02F3/00
    • G02F1/313G02F1/3132G02F3/00
    • PURPOSE:To perform switching with low crosstalk with 0-1 volt by coupling (n-1) optical waveguides with one optical waveguide mutually different coupling points. CONSTITUTION:One input optical waveguide 32 and four output optical waveguides 33-36 are installed on a dielectric or semiconductor substrate 1 and optical directional couplers 40-43 having mutual close light transmission directions are constituted successively between the optical waveguide 32 and four optical waveguides 33-36; and control electrodes 44-47 are arranged on those optical directional couplers. Then, only the control electrode of an optical directional coupler constituted between inpt and output optical waveguides to be connected mutually is held at 0V, and the other control electrode is applied with a voltage V'. When the amount of coupling is zero, low crosstalk is obtained easily without any influence of the asymmetry of the optical waveguides. Therefore, switching with low crosstalk is carried out between 0 and 1volt.
    • 目的:通过耦合(n-1)光波导与一个光波导相互不同的耦合点来执行具有0-1伏的低串扰的切换。 构成:一个输入光波导32和四个输出光波导33-36安装在电介质或半导体基板1上,并且具有相互接近的光传输方向的光定向耦合器40-43依次构成在光波导32与四个光波导33之间 -36; 并且控制电极44-47布置在那些光学定向耦合器上。 然后,仅将互相连接的输入光波导之间构成的光学定向耦合器的控制电极保持在0V,另一个控制电极施加电压V'。 当耦合量为零时,容易获得低串扰,而不影响光波导的不对称性。 因此,低串扰的切换在0和1V之间进行。