Authors:  Zhichao Ye 1, Mohammed S. Alshaykh2 and Andrew M. Weiner 3,∗

JSA-Vol. 4 (2025),

1 3Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg SE-41296,

Sweden

2 Electrical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia.

3 Elmore Family School of Electrical and Computer Engineering and Purdue Quantum Science and Engineering

Institute, Purdue University, West Lafayette, Indiana 47907, USA.

* Correspondence: amw@purdue.edu

Received: 30 November 2023; Accepted: 6 April 2025; Published: 10 May 2025.

Abstract: Integrated photonic platforms have emerged as a powerful route toward scalable quantum information processing with entangled photons. Recent demonstrations of on-chip pulse shaping for biphoton frequency combs have enabled programmable temporal manipulation using phase-only spectral control. However, phase-only shaping fundamentally limits the achievable temporal waveforms, entanglement fidelity, and robustness against device imperfections. In this work, we propose and analyze a fully reconfigurable amplitude–phase on-chip biphoton pulse shaping framework based on microring-resolved spectral manipulation. By introducing independent amplitude control in each frequency channel alongside phase tuning, the proposed architecture enables arbitrary complex spectral shaping of entangled photon pairs. We develop a theoretical model, analyze implementation strategies, and demonstrate through numerical simulations that amplitude–phase shaping significantly enhances temporal waveform synthesis, high-dimensional entanglement control, and interference visibility compared to phase-only approaches. The proposed framework establishes a critical step toward universal quantum frequency processing on integrated photonic platforms.

Keywords: Integrated quantum photonics; biphoton pulse shaping; frequency-bin entanglement; microring resonators; amplitude–phase control.