Optical Switch

Abstract

An optical switch according to the present disclosure includes: at least one switch function unit in which a plurality of one-input/two-output optical switches is connected in cascade; an optical coupler function unit in which a plurality of two-input/one-output optical couplers to which an optical signal output from the switch function unit is input is connected in cascade; and at least one of a first monitoring output port and a second monitoring output port, wherein the first monitoring output port is a port that transmits a first monitoring optical signal output from the switch function unit to an outside, and the second monitoring output port is a port that transmits, to an outside, a second monitoring optical signal output from a two-input/two-output optical coupler provided in place of a two-input/one-output optical coupler located at an end on an output side among the plurality of two-input/one-output optical couplers.

Dependencies are inferred from the claim text.