Fine-grained All-fiber Nonlocal Dispersion Compensation in the Telecommunications O-Band

TL;DR

This paper demonstrates precise nonlocal dispersion compensation in fiber optic telecommunications using fine-grained measurements, achieving near-ideal timing correlation preservation over multi-kilometer spans suitable for real-world deployment.

Contribution

It introduces a method for fine-grained, all-fiber nonlocal dispersion compensation in the O-band, with experimental validation over 10 km spans.

Findings

Near-ideal dispersion compensation achieved with 1 km fiber increments

Photon timing correlations preserved down to 51 ps over 20 km

Compatible with real-world fiber deployment

Abstract

Nonlocal dispersion compensation between broadband photon pairs propagated over fiber corresponding to the ITU-T G.652D telecommunications standard was studied via fine-grained measurements of the temporal correlation between them. We demonstrated near-ideal levels of nonlocal dispersion compensation by adjusting the propagation distance of the photon pairs to preserve photon timing correlations close to the effective instrument resolution of our detection apparatus (41.0$\pm$0.1ps). Experimental data indicates that this degree of compensation can be achieved with relatively large fiber increments (1km), compatible with real-world deployment. Ultimately, photon timing correlations were preserved down to 51ps$\pm$21ps over two multi-segmented 10km spans of deployed metropolitan fiber.