Photonic attenuator circuit with vertical interferometric structure

摘要

A photonic circuit for amplitude attenuation of an optical signal includes a Mach-Zehnder interferometer for coupling an input waveguide (14) and an output waveguide (15). ), said interferometer comprising a modulation section (SM1) which has a first waveguide (11), a second waveguide (12) and a phase shifter (13) configured to introduce a phase difference between a first signal optical flowing on the first waveguide and a second optical signal flowing on the second waveguide. The first and the second waveguide are arranged in two separate parallel layers and the phase shifter is a thermo-optical phase shifter arranged to act preferentially on one of the first and second waveguides. Figure for the abstract: Figure 4