Method and system for obtaining variable optical attenuation with very low polarization dependent loss over an ultra wide dynamic range
    1.
    发明授权
    Method and system for obtaining variable optical attenuation with very low polarization dependent loss over an ultra wide dynamic range 失效
    用于在超宽动态范围内获得具有非常低的偏振相关损耗的可变光衰减的方法和系统

    公开(公告)号:US06856751B2

    公开(公告)日:2005-02-15

    申请号:US10159044

    申请日:2002-06-03

    IPC分类号: G02B6/34 G02B6/00 G01C19/72

    CPC分类号: G02B6/29355 G02B6/266

    摘要: A method and system of operating a variable optical attenuator to provide a required total attenuation in a planar lightwave circuit. The method comprises providing a first Mach-Zehnder interferometer having a first and a second arm carrying signals in an arbitrary polarization state, providing a second Mach-Zehnder interferometer having a third and a fourth arm carrying signals in an arbitrary polarization state, the second Mach-Zehnder interferometer concatenated in tandem with the first Mach-Zehnder interferometer, and cooperatively operating the concatenated first and second Mach-Zehnder interferometers to obtain the required total attenuation and an effectively nil polarization dependent loss.

    摘要翻译: 一种操作可变光衰减器以在平面光波电路中提供所需总衰减的方法和系统。 该方法包括提供具有第一和第二臂的第一马赫 - 曾德尔干涉仪,该第一和第二臂承载任意极化状态的信号,提供第二马赫 - 曾德尔干涉仪,其具有承载任意偏振态的信号的第三和第四臂,第二马赫 -Zehnder干涉仪与第一马赫 - 策德尔干涉仪串联连接,并协同操作级联的第一和第二马赫 - 策德尔干涉仪,以获得所需的总衰减和有效的零极化相关损耗。