Generation of Tunable Correlated Frequency Comb via Four-Wave-Mixing in Optical fibers

TL;DR

This paper demonstrates an all-fiber setup for generating tunable correlated photon pairs using four-wave mixing in highly nonlinear fibers, with experimental and simulation results confirming the process's effectiveness and dynamics.

Contribution

It introduces a novel all-fiber experimental configuration for tunable correlated photon-pair generation and provides a detailed theoretical model matching experimental observations.

Findings

Achieved a maximum of 32 kcps photon pair rate.

Coincidence to accidental ratio of 17±1.

Simulation results agree with experimental data.

Abstract

We report an all-fiber-based experimental setup to generate a correlated photon-pair comb using Four Wave Mixing (FWM) in Highly Non-Linear Fiber (HNLF). Temporal correlations of the generated photons were confirmed through coincidence measurements. We observed a maximum of 32 kcps, with a coincidence to accidental ratio of 17$\pm$1. To further understand the underlying processes, we also simulated a generalized FWM event involving the interaction between an arbitrary frequency comb and a Continuous Wave (CW) pump. Non-linear dynamics through the HNLF were modelled using Schr\"odinger propagation equations, with numerical predictions agreeing with our experimental results.