Optical coprocessor based on spontaneous Brillouin scattering
Phys. Rev. A 114, 013501 – Published 6 July, 2026
DOI: https://doi.org/10.1103/7zrl-mdsb
Abstract
Analog coprocessors for neural networks are an intensively developing field. They provide approximate results of computations for relatively low energy cost and at high speed. We show that a set of ring resonators with Brillouin interaction between photons and phonons, being coupled to a waveguide, can be used to implement matrix-vector multiplication. The input vector is formed by occupancies of the anti-Stokes optical modes pumped via spontaneous Brillouin scattering, i.e., scattering on thermal phonons. Brillouin scattering rates and coupling constants between ring resonators and the waveguide form the matrix.
