Work

Joint Detection on Reconfigurable Photonic Processors With Multi-Input Phase Stabilization

Year: 2026

Type: article

Abstract: We report a joint-detection (JD) experiment between two reconfigurable photonic processors in which Hadamard codewords are generated on a transmitter processor and a Hadamard transform is performed on a receiver (decoder) processor. Crucially, the decoder executes multi-input phase stabilization concurrently with the optical Hadamard combining, ensuring the phase alignment required for coherent joint detection. We demonstrate JD using 2×2 and 4×4 Hadamard transformations and verify stable temporal outputs under active on-chip feedback control (FBC). The approach leverages our multi-input FBC scheme to suppress low-frequency inter-input phase fluctuations and to realize coherent combining consistent with Green-Machine style architectures. These results indicate a practical path to scalable, codeword-level optical joint detection on programmable photonic hardware and are compatible with larger-mode processors and higher-order code families.

Source: IEEE photonics journal

DOI: 10.1109/jphot.2026.3683204

Authors: Igor A. Litvin, Gökhan Elmas, Janis Nötzel

Institution: Technical University of Munich

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,075