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    • 7. 发明申请
    • SYSTEM FOR PASSIVE SCRAMBLING AND UNSCRAMBLING OF AN OPTICAL SIGNAL
    • 被动扫描系统和光信号的解码
    • WO2008143982A1
    • 2008-11-27
    • PCT/US2008/006300
    • 2008-05-16
    • CORNING INCORPORATEDKUKSENKOV, Dmitri, V.LI, ShenpingNOLAN, Daniel, A.
    • KUKSENKOV, Dmitri, V.LI, ShenpingNOLAN, Daniel, A.
    • H04B10/13H04L9/00
    • H04B10/85H04B10/2581
    • A system for passively scrambling and unscrambling a, pulse optical signal transmitted through a multi-mode optical fiber is provided. The system includes a scrambling unit connected between a signal receiving end of said transmission fiber and an optical signal source that includes an optical fiber which creates a differential delay between two groups of optical modes of the signal that is at least one bit period long such that said optical signal is passively scrambled, and an unscrambling unit connected to a signal transmitting end of said transmission fiber having an optical fiber that counteracts said differential delay between said two groups of optical modes of the signal such that said optical signal is passively unscrambled. The scrambling unit optical fiber has an alpha profile with a complementary perturbation that creates the differential delay between two groups of optical modes of the signal, and the unscrambling unit optical fiber has an alpha profile with reversal complementary perturbation that counteracts the differential delay between said two groups of optical modes of the signal. Alternatively, the scrambling and unscrambling units may have the combination of a mode splitter that splits the signal into two different groups of optical modes, and a pair of optical fibers that conduct the two groups of optical modes in parallel, the fibers being of different lengths to create or to counteract a differential delay in the two groups of modes.
    • 提供一种用于被动加扰和解扰通过多模光纤传输的脉冲光信号的系统。 该系统包括连接在所述传输光纤的信号接收端和光信号源之间的加扰单元,所述光信号源包括光纤,该光纤在至少一位周期长的信号的两组光模之间产生差分延迟,使得 所述光信号被无源加扰,并且一个解扰单元连接到具有光纤的所述传输光纤的信号发送端,该光纤抵消所述信号的所述两组光模之间的所述差分延迟,使得所述光信号被被动地解扰。 加扰单元光纤具有具有互补扰动的α分布,其产生信号的两组光模式之间的差分延迟,并且解扰单元光纤具有反转互补扰动的α分布,其抵消所述两个 信号组的光模式。 或者,加扰和解扰单元可以具有将信号分解成两个不同组的光模式的模式分离器的组合,以及并行地传导两组光学模式的一对光纤,所述光纤具有不同长度 以创建或抵消两组模式中的差分延迟。