OPTICAL PHASE MODULATOR Russian patent published in 2024 - IPC G02F1/01 

FIELD: photonics.

SUBSTANCE: invention relates to photonics and relates to an optical phase modulator. Phase modulator comprises an optical waveguide limited by an optical input and an output, between which there is a splitter connecting the optical waveguide with a controlled ring resonator. Phase modulator is equipped with an additional optical waveguide limited by input and output splitters, which connect the additional optical waveguide to the optical waveguide, respectively, between the optical input and the controlled ring resonator and the optical output and the controlled ring resonator. Splitters are made with division coefficients determined by expression: where q_in and q_out are division factors of input and output splitters, respectively; q_res is the division factor of the splitter connecting the optical waveguide to the controlled ring resonator; a is the amplitude transmission coefficient of the controlled ring resonator.

EFFECT: elimination of residual amplitude modulation in output signal with phase modulation.

10 cl, 3 dwg, 1 tbl