Hong-Ou-Mandel dip using photon pairs from a PPLN waveguide

TL;DR

This paper demonstrates an experimental Hong-Ou-Mandel dip using photon pairs generated in a lithium niobate waveguide, achieving high visibility and showcasing potential for quantum computing and imaging applications.

Contribution

The study introduces a novel integrated waveguide source for photon pairs with high visibility, advancing integrated quantum optics technology.

Findings

Achieved 80% visibility in Hong-Ou-Mandel interference

Generated photon pairs at 1.5 μm wavelength in a PPLN waveguide

Demonstrated potential applications in quantum computing and optical coherence tomography

Abstract

We experimentally observed a Hong-Ou-Mandle dip with photon pairs generated in a periodically poled reverse-proton-exchange lithium niobate waveguide with an integrated mode demultiplexer at a wavelength of 1.5 um. The visibility of the dip in the experiment was 80% without subtraction of any noise terms at a peak pump power of 4.4 mW. The new technology developed in the experiment can find various applications in the research field of linear optics quantum computation in fiber or quantum optical coherence tomography with near infrared photon pairs.