Fig. 1
From: Large-scale coherent Ising machine based on optoelectronic parametric oscillator
The schematic diagram and operation principle of the proposed OEPO-based Ising machine. a The schematic diagram. Spins are represented as binary phases of short microwave pulses generated from the OEPO, and spin interactions are realized by using different channels in the optical path with configurable delays. MZM Mach-Zehnder modulator, DSF dispersion-shifted fiber, MUX multiplexer, ODL optical delay line, DEMUX demultiplexer, EDFA Erbium-doped fiber amplifier, PD photodetector, EA electrical amplifier, BPF bandpass filter, LO local oscillator. b A given spin-spin interaction would change the global network loss, and the minimum-loss operation can be achieved by gradually increasing the gain of the OEPO network. c The network with the minimum-loss spin configuration has the maximum possibility to oscillate, and the phase configuration corresponds to the answer to a given Ising problem
