| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wavelength-multiplexed light amplifying apparatus to be used in a state of being connected to a branching port of a multiplexing/branching unit for a wavelength-multiplexed optical signal or to be used for a m×n matrix optical switch of an optical cross-connect, wherein the a wavelength-multiplexed light amplifying apparatus is configured to disperses the power loss of an optical signal to perform amplification with high efficiency, and further enable the expansion of the branching port in the in-service, eliminate the need for the installation of an optical isolator or reduce the required value of isolation to stabilize the system, or accomplish the control to maintain the gains of all ports constant. <P>SOLUTION: The wavelength-multiplexed light amplifying apparatus 31 is composed of a plurality of wavelength-multiplexed light amplifying units 30 and an optical feedback loop system 34. A signal input port of an optical branching section 1a in a wavelength-multiplexed light amplifying unit 30 (C, D, E, F) is connected to an output side of an optical amplifying section 2c (2d, 2e, 2f) in the preceding wavelength-multiplexed light amplifying unit 30 (B). <P>COPYRIGHT: (C)2007,JPO&INPIT |
