Simulation of integrated nonlinear quantum optics: from nonlinear interferometer to temporal walk-off compensator

TL;DR

This paper presents a comprehensive simulation framework for integrated nonlinear quantum photonics, enabling accurate modeling of complex features and proposing a device scheme to improve quantum source performance without increased pump power.

Contribution

The authors develop a versatile simulation framework for integrated nonlinear quantum optics and introduce a novel chip-scale temporal walk-off compensator for enhanced quantum device performance.

Findings

The simulation framework accurately models various integrated photonics features.

The proposed device scheme improves squeezing and conversion efficiency.

Enhancements are achieved without increasing pump power.

Abstract

Nonlinear quantum photonics serves as a cornerstone in photonic quantum technologies, such as universal quantum computing and quantum communications. The emergence of integrated photonics platform not only offers the advantage of large-scale manufacturing but also provides a variety of engineering methods. Given the complexity of integrated photonics engineering, a comprehensive simulation framework is essential to fully harness the potential of the platform. In this context, we introduce a nonlinear quantum photonics simulation framework which can accurately model a variety of features such as adiabatic waveguide, material anisotropy, linear optics components, photon losses, and detectors. Furthermore, utilizing the framework, we have developed a device scheme, chip-scale temporal walk-off compensation, that is useful for various quantum information processing tasks. Applying the simulation framework, we show that the proposed device scheme can enhance the squeezing parameter of photon-pair sources and the conversion efficiency of quantum frequency converters without relying on higher pump power.