Photonic attenuator with vertical interference structure

摘要

The invention relates to an optical signal amplitude attenuation photonic circuit, including a Mach Zehnder interferometer for coupling an input waveguide (14) and an output waveguide (15),The interferometer comprises a modulation part (SM1) having a first waveguide (11),A second waveguide (12) and a phase shifter (13) configured to introduce a phase difference between the first optical signal cycled on the first waveguide and the second optical signal cycled on the second waveguide.The first waveguide and the second waveguide are arranged in two independent parallel layers, the phase shifter is a thermo optical phase shifter, and the phase shifter is arranged to act preferentially on one of the first waveguide and the second waveguide.Abstract figure: Figure 4