The invention discloses a
silicon dioxide and
polymer combined and integrated optical
waveguide type thermal-
optical modulator. The thermal-
optical modulator comprises an input
waveguide, an input connecting
waveguide, a 1*2
optical power splitter, a first tapered waveguide, a transmission arm, a second tapered waveguide, a 2*1 combiner, an output connecting waveguide and an output waveguide. Input light passes through the input waveguide and is connected with one end of the 1*2
optical power splitter through the input connecting waveguide, the 1*2
optical power splitter generates interference, and two split light beams with the ratio of 1:1 are obtained. One end of the 1*2 optical power splitter is connected with one end of the transmission arm through the first tapered waveguide, the other end of the transmission arm is connected with one end of the 2*1 combiner through the second tapered waveguide, and the other end of the 2*1 combiner is connected with the output waveguide through the output connecting waveguide. The thermal-
optical modulator has the advantages of being compact in structure, easy to manufacture and insensitive to wave length; meanwhile, the manufacturing process of
polymer optical waveguides is simple, and therefore the process difficulty of the thermal-optical modulator is lowered.