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    • 10. 发明授权
    • Cascaded optical multiplexer
    • 级联光复用器
    • US06871022B2
    • 2005-03-22
    • US09952286
    • 2001-09-14
    • Xiaojie Xu
    • Xiaojie Xu
    • G02B6/28G02B6/34H04J14/00
    • G02B6/29386G02B6/2861G02B6/2935
    • Methods and apparatus for multiplexing and demultiplexing optical signals. An interleaver having a modified Mach-Zehnder interferometer as a first stage is used as a wavelength division multiplexer. This first stage is combined with one or more cascaded stages, each having a beam splitter and an optical delay element. A light beam including a number of signals at different wavelengths is received. The beam is split such that approximately half of each signal is contained in one of two sub-beams. One of the two sub-beams passes through a delay element, which provides a phase shift. The two sub-beams are recombined and split again. Each wavelength adds constructively or destructively in the new sub-beams such that the signals are separated—some wavelengths are in one of the new sub-beams, some are in the other. One of these sub-beams is delayed, and the two are combined and split again, improving the separation.
    • 用于复用和解复用光信号的方法和装置。 具有作为第一级的修正的马赫 - 曾德干涉仪的交织器被用作波分复用器。 该第一级与一个或多个级联级组合,每级具有分束器和光学延迟元件。 接收包括不同波长的多个信号的光束。 光束被分离,使得每个信号的大约一半被包含在两个子光束之一中。 两个子光束中的一个通过延迟元件,其提供相移。 这两个子光束再次重合并分裂。 每个波长在新的子光束中建设性地或相消地增加,使得信号被分离 - 一些波长在新的子光束之一中,一些在另一个中。 这些子光束中的一个被延迟,并且两个被再次组合和分离,从而改善了分离。