Optical switch system using optical interference

An optical switch system (1) comprising:

• one or a plurality of input parts (2) of an optical signal;
• a main Mach-Zehnder waveguide (MZC) (7) comprising:
• a branching part (3) for branching the optical signal,
• a first arm (4) being a waveguide, wherein an optical signal branched by the branching part (3) propagates,
• a second arm (5) being a waveguide, wherein the other optical signal branched by the branching part (3) propagates, and
• a combining part (6) for combining the optical signals, the optical signals being outputted from the first arm (4) and the second arm (5);
• one or a plurality of output parts (8) for outputting the optical signal, the optical signal being combined by the combining part;
• a first intensity modulator (9) being provided on the first arm (4), the first intensity modulator controlling an amplitude of the optical signal, the optical signal propagating through the first arm;
• a second intensity modulator (10) being provided on the second arm (5), the second intensity modulator controlling an amplitude of the optical signal, the optical signal propagating through the second arm;
• a first electrode (electrode A) (11) of the first intensity modulator (9);
• a second electrode (electrode B) (12) of the second intensity modulator (10);
• a third electrode (electrode C) (13) of the main Mach-Zehnder waveguide (MZC) (7), wherein a modulation signal is applied to the third electrode, the modulation signal controlling a phase difference between optical signals, the optical signals respectively propagating through the first arm and the second arm;
• and
• a signal source part (16) comprising a first signal source (14) and a second signal source (15), the first signal source (14) applying bias voltage to the first electrode (electrode A) (11), the second electrode (electrode B) (12), and the third electrode (electrode C) (13), the second signal source (15) applying a high-speed electric signal to the third electrode (electrode C) (13),
• wherein one or both of the branching part (3) and the combining part (6) are X-branched.