On-chip pulse shaping of entangled photons

2024/09/20 by Kaiyi Wu, Wu, Kaiyi, Lucas M. Cohen +11 · 2 citations
Computer Science · Engineering · Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #Orbital Angular Momentum in Optics #Photonic and Optical Devices #Quantum Information and Cryptography #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2409.13638

openalex publication_date 2024/09/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate spectral shaping of entangled photons with a six-channel microring-resonator-based silicon photonic pulse shaper. Through precise calibration of thermal phase shifters in a microresonator-based pulse shaper, we demonstrate line-by-line phase control on a 3~GHz grid for two frequency-bin-entangled qudits, corresponding to Hilbert spaces of up to 6× 6 (3× 3) dimensions for shared (independent) signal-idler filters. The pulse shaper's fine spectral resolution enables control of nanosecond-scale temporal features, which are observed by direct coincidence detection of biphoton correlation functions that show excellent agreement with theory. This work marks, to our knowledge, the first demonstration of biphoton pulse shaping using an integrated spectral shaper and holds significant promise for applications in quantum information processing.

Cited by

• Beyond critical coupling: optimal design considerations for spontaneous four-wave mixing in microring resonators
• Multi-dimensional frequency-bin entanglement-based quantum key distribution network

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