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    • 71. 发明公开
    • Filter tap for optical communication systems
    • 在optischen Kommunikationssystemen的Filterabzweigung。
    • EP0260654A2
    • 1988-03-23
    • EP87113473.0
    • 1987-09-15
    • Hicks, John Wilbur, Jr.
    • Hicks, John Wilbur, Jr.
    • G02B6/34H04J14/00H01S3/00
    • G02B6/4215G02B6/29337G02B6/29358G02B6/29359H01S3/06754
    • A filter tap for optical communication systems includes an optical resonant cavity comprising generally parallel, facing dielectric mirrors spaced to permit resonance in a selected band of channels. Optical signals from an input portion of a main trunk line carrying optical signals on a plurality of bands are coupled to one of the mirrors at an end face of the resonant cavity and are coupled from the one mirror to an output portion of the main trunk line with minimal reduction in optical signals in nonselected bands. Optical signals in the selected band are coupled from the other of the mirrors on the other end face of the resonant cavity to a branch line. In one preferred embodiment, the cavity is a finer optic resonant cavity and trunk line optical fibers are coupled directly to one of the mirrors of the cavity. Power is coupled from the input portion to the output portion of the trunk line by evanescent coupling. A second resonant cavity can couple power in the same or a different band to a second branch line. Optical pumping can be utilized at the filter tap for optical signal amplification. The filter tap can include a macro-optical resonant cavity and lenses for directing optical signals between optical fiber cores and the resonant cavity.
    • 用于光学通信系统的滤波器抽头包括光学谐振腔,其包括大致平行的面对的电介质镜,间隔开以允许在所选频带中的共振。 来自在多个带上承载光信号的主干线的输入部分的光信号在谐振腔的端面处耦合到一个反射镜,并且从该一个反射镜耦合到主干线的输出部分 在非选择频带中的光信号的最小化。 所选频带中的光信号从谐振腔的另一端面上的另一个反射镜耦合到分支线。 在一个优选实施例中,空腔是更细的光学谐振腔,并且干线光纤直接耦合到空腔的一个反射镜。 功率通过渐逝耦合从干线的输入部分耦合到输出部分。 第二谐振腔可以将相同或不同频带中的功率耦合到第二分支线。 滤波器抽头可以使用光泵浦进行光信号放大。 滤波器抽头可以包括宏光谐振腔和用于在光纤芯和谐振腔之间引导光信号的透镜。