Patent ID: 6414769
Filing Date: 2002-07-02
Classification: H04B,H04J

Abstract:
Optical amplifier comprising:a first input for inputting first optical signals propagating in a first direction having a first series of mutually distinct wavelengths; a first output for outputting second optical signals propagating in a first direction having said first series of mutually distinct wavelengths; a first amplifier for amplifying said first optical signals; and a first optical circulator having an input port coupled to said first amplifier, an intermediate port coupled to a first end of a first selective reflection circuit, an output port coupled to said first output; and further comprising a second optical circulator having an intermediate port coupled to a second end of said first selective reflection circuit; an output port coupled to a first selective splitter, with passband centered around a first predetermined wavelength of said first series and wide enough to exclude the adjacent wavelengths of said first series; and an input port coupled to a second selective splitter, with passband centered around said first predetermined wavelength of said first series and wide enough to exclude the adjacent wavelengths of said first series.