Thermo-optical phase shifter, Mazehnder interferometer and optical computing network

The invention discloses a thermo-optical phase shifter, a Marchehnder interferometer and an optical computing network. The thermo-optical phase shifter comprises a lithium niobate waveguide layer and a heating piece, and the lithium niobate waveguide layer is used for transmitting light waves; and the heating piece is arranged to heat the lithium niobate waveguide layer, so that the lithium niobate waveguide layer adjusts the phase of the light wave. The lithium niobate waveguide layer is heated by using the heating piece, so that the temperature of the lithium niobate waveguide layer can be increased, the refractive index of the lithium niobate waveguide layer is further adjusted, and the phase of light waves transmitted in the thermo-optic phase shifter is adjusted. The Marhnder interferometer adopting the thermo-optical phase shifter can effectively avoid the phenomenon that phase difference which does not conform to expectation is generated when light waves reach the second Y branch. 本发明公开了一种热光相移器、马曾干涉仪及光