Dual-Polarization Phase Retrieval Receiver in Silicon Photonics

TL;DR

This paper presents a silicon photonic dual-polarization receiver capable of phase retrieval from intensity measurements without a local oscillator, enabling high-speed polarization-division multiplexed signal recovery over long distances.

Contribution

It introduces a novel silicon photonic device design for phase retrieval that operates without a local oscillator, advancing high-speed optical communication technology.

Findings

Successfully retrieves phase of polarization-division multiplexed signals

Operates over 80 km of standard single-mode fiber

Supports high data rates of 30-GBd QPSK and 20-GBd 8QAM

Abstract

We demonstrate a silicon photonic dual-polarization phase retrieval receiver. The receiver recovers phase from intensity-only measurements without a local oscillator or transmitted carrier. We design silicon waveguides providing long delays and microring resonators with large dispersion to enable symbol-to-symbol interference and dispersive projection in the phase retrieval algorithm. We retrieve the full field of a polarization-division multiplexed 30-GBd QPSK and 20-GBd 8QAM signals over 80 km of SSMF.