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Optical coprocessor based on spontaneous Brillouin scattering

I. V. Vovchenko1,3, A. A. Zyablovsky1,2,3, A. A. Pukhov1,2, and E. S. Andrianov1,2,3

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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.

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Phys. Rev. A 114, 013501– Published 6 July, 2026
  • Received 13 January 2026
  • Accepted 18 June 2026
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