Noise Performance Comparison of 1.5 um Correlated Photon Pair Generation in Different Fibers

TL;DR

This study compares the noise performance of correlated photon pair generation at 1.5 um in three fiber types, finding that microstructure fiber with pure silica core offers the lowest noise due to its material properties.

Contribution

It provides an experimental comparison of noise performance in different fibers for photon pair generation and links noise levels to fiber material properties.

Findings

Microstructure fiber has the lowest Raman noise photon generation rate.

Photon pair generation rate is similar across fiber types.

Material properties influence noise performance significantly.

Abstract

In this paper, the noise performances of 1.5 um correlated photon pair generations based on spontaneous four wave-mixing in three types of fibers, i.e., dispersion shifted fiber, highly nonlinear fiber, and highly nonlinear microstructure fiber are investigated experimentally. Result of the comparison shows that highly nonlinear microstructure fiber has the lowest Raman noise photon generation rate among the three types of fibers while correlated photon pair generation rate is the same. Theoretical analysis shows that the noise performance is determined by the nonlinear index and Raman response of the material in fiber core. The Raman response raises with increasing doping level, however, the nonlinear index is almost unchanged with it. As a result, highly nonlinear microstructure fiber with pure silica core has the best noise performance and has great potential in practical sources of correlated photon pairs and heralded single photons.