All-photonic Boolean logic device based on phase change straight waveguide and full binary logic implementation method thereof

A straight waveguide phase change all-photonic Boolean logic device, comprising:

• a straight waveguide, two phase change functional units, and a Bragg grating, wherein
• on the upper surface of the straight waveguide there is a ridge, the two phase change functional units and the Bragg grating are all disposed on the ridge;
• the Bragg grating is located between the two phase change functional units and is in a straight line with the two phase change functional units;
• based on an evanescent wave coupling effect, an optical pulse signal with a relatively large power is input into the straight waveguide from any one of the two ends, the phase change functional unit near the end absorbs a part of the relatively large power and generates a crystalline or amorphous phase change to implement a write operation;
• when the two phase change functional units have different state combinations, transmittance of a detection optical signal would be different accordingly, which is used to implement a reading operation;
• when the write operation is performed on one phase change functional unit, the optical pulse signal transmitted from one side of the Bragg grating does not act on the other phase change functional unit of the two phase change functional units on other side;
• through the writing write operation and the reading operation on the two phase change functional units, the straight waveguide phase change all-photonic Boolean logic device implements functions of all 16 types of binary Boolean logic operations.