OPTICAL ADDING AND DROPPING DEVICE AND OPTICAL TRANSMISSION APPARATUS

摘要

PROBLEM TO BE SOLVED: To achieve low cost of a device configuration while it has adding and dropping functions.

SOLUTION: An optical adding and dropping device is provided with: a drop section 2a including an input port and having a through port and a plurality of drop ports set as output ports; and a first multiplexer 2b for multiplexing light from the through port and light from a plurality of add ports, wherein a spectrum foot removing section 2c is provided on the input side of the first multiplexer 2b and adapted to remove a foot of a spectrum of light to be input from the add ports to the first multiplexer 2b.

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