Studying frequency correlations of photon pairs generated via spontaneous four–wave mixing in a microring resonator

Ilya Chuprina,Alexey Kalachev

doi:10.1051/epjconf/201716103002

Abstract

Spontaneous four–wave mixing (SFWM) in a microring resonator is considered theoretically. The joint spectral amplitude and Schmidt number of generated biphoton field are calculated numerically for different pump pulses. Optimal pulse shapes that provide maximum efficiency of SFWM and minimum frequency correlations between signal and idler photons are found.

Highlights

The Spontaneous four-wave mixing (SFWM) process involves sending a pump laser beam into a third-order nonlinear material so that the nonlinear interaction occasionally leads to the annihilation of two pump photons and creation of two photons in other modes under conditions of energy conservation and phase matching
It has been shown recently that short and broadband pump pulses allow reducing or even eliminating frequency correlation between the emitted photons [4, 5], which is crucial for preparing pure heralded single-photon states
We study the dependence of frequency correlation and efficiency of photon pair generation on the pump pulse waveform

Summary

Introduction

The SFWM process involves sending a pump laser beam into a third-order nonlinear material so that the nonlinear interaction occasionally leads to the annihilation of two pump photons and creation of two photons in other modes (referred to as signal and idler) under conditions of energy conservation and phase matching. Spontaneous four-wave mixing (SFWM) in a microring resonator is considered theoretically.

Results

Conclusion