| 摘要 |
PROBLEM TO BE SOLVED: To scatter the power loss of a light signal for efficient amplification, at the same time expand branch ports in in-service, stabilize a system by eliminating the need for a light isolator or reducing the required isolation, and achieving control for constantly maintaining the gain of entire ports in a wavelength multiplex optical amplification device connected to the branch port of a device for merging or branching a wavelength multiple light signal for use or is used for the m×n matrix light switch of a light cross connection device. SOLUTION: In the wavelength multiple optical amplification device 25 consisting of a plurality of wavelength multiple optical amplification units 30 and a light feedback loop system 34, the signal input port of a light branch part 1a in the wavelength multiple optical amplification units 30 (C, D, E, and F) is connected to the output side of optical amplification parts 2c (2d, 2e, and 2f) in a wavelength multiple optical amplification unit 30 (B) at the previous stage. |
