Optical Switch
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.
1 . An optical switch comprising:
at least one switch function unit wherein a plurality of one-input/two-output optical switches is connected in cascade;
an optical coupler function unit wherein a plurality of two-input/one-output optical couplers that 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.
2 . The optical switch according to claim 1 , further comprising a photoelectric conversion element that converts an optical signal transmitted from at least one of the first monitoring output port and the second monitoring output port into an electric signal.
3 . The optical switch according to claim 1 , wherein:
the optical switch is a waveguide type optical switch formed on a silicon substrate, including silica-based glass containing SiO 2 as a main component, and manufactured by a planar lightwave circuit technique; and
the optical switch is driven by use of a thermo-optical effect.