[8a-S2-1~11] 3.13 Silicon photonics, Photonics-electronics convergence, Optical control

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[8a-S2-2] Fast In-situ Calibration of Photonic Matrix Circuits Using Natural Perturbation and Linear-Combination Natural Gradient

〇Shota Kita^1,2, Hiroshi Sawada³, Kohei Ikeda^1,2, Kazuo Aoyama³, Yuriko Maegami⁴, Guangwei Cong⁴, Noritsugu Yamamoto⁴, Koji Yamada⁴, Akihiko Shinya^1,2, Hisashi Sumikura^2,3, Masaya Notomi^1,2 (1.NTT NPC, 2.NTT BRL, 3.NTT CSL, 4.AIST)

Keywords:

photonic computing,zeroth order optimization,silicon photonics

Motivated by advances in short-reach optical communications for AI data centers and their potential use in optical-electronic converged computing platforms, we applied improved zeroth-order optimization to in-situ calibration of a photonic matrix circuit. By using natural perturbation and linear-combination natural gradient, we experimentally demonstrated convergence with approximately one order of magnitude fewer forward propagations than the conventional Rademacher-perturbation method in a permutation-matrix implementation task using a 10×10 Clements mesh.