Low-loss, chip-scale programmable silicon photonic processor

https://phys.org/news/2022-11-low-loss-chip-scale-programmable-silicon-photonic.html

"2-µm-wide arm waveguides, and thus the random phase errors in the MZC/MZS arms are negligible, in which case the calibration for these MZSs/MZCs becomes easy and furthermore the power consumption for compensating the phase errors can be reduced greatly. In addition, each channel has a Ge/Si photodetectors and grating coupler to detect the signal... tunable time-delay, microwave photonic beamforming, arbitrary optical signal filtering, and arbitrary waveform generation"