Optical amplifier, optical amplifying method and o

专利名称：Optical amplifier, optical amplifying method

and optical transmission system using theoptical amplifier

发明人：Junya Kosaka,Takayuki Suzuki,Hideyuki

Kuwano

申请号：US08/833355申请日：19970404公开号：US05835260A公开日：19981110

摘要：An optical amplifier including an input unit, a polarization maintaining opticalamplifying unit, an exciting unit and an output unit. The input unit enables receiving a firstsignal light in a first polarization state and a second signal light in a second polarizationstate different from the first polarization state. The polarization maintaining opticalamplifying unit includes a polarization maintaining optical amplifying medium enablingreceiving the first and second signal lights and amplifying the first and second signallights with the first and second polarization states maintained as they are. The excitingunit provides first and second exciting lights having polarization states corresponding tothe first and second signal lights, respectively, so that the polarization maintaining opticalamplifying unit is capable of selectively amplifying the first and second signal lights, andthe output unit enables receiving the first and second signal lights after being amplifiedby the polarization maintaining optical amplifying unit and outputting the amplified firstand second signal lights to a transmission line.

申请人：HITACHI, LTD.

代理机构：Antonelli, Terry, Stout & Kraus, LLP

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