Spectrally engineered broadband photon source for two-photon quantum interferometry
Abu Thomas, Mackenzie Van Camp, Olga Minaeva, David Simon and, Alexander V. Sergienko
TL;DR
This paper introduces a novel broadband entangled photon source using chirped quasi-phase-matched lithium niobate waveguides with asymmetric poling, enhancing quantum interferometry capabilities.
Contribution
It presents a new method of engineering broadband entangled photon sources with asymmetric poling to improve bandwidth and maintain high visibility in quantum sensing.
Findings
Broadens entangled photon source bandwidth
Maintains high quantum interference visibility
Mitigates phase distortions with asymmetric poling
Abstract
We present a new approach to engineering broadband sources of entangled photon pairs for quantum interferometry. The source is based on quasi-phase-matched spontaneous parametric down conversion in a titanium diffused periodically poled lithium niobate waveguide with a strongly-chirped poling period. The proposed non-standard asymmetric poling mitigates phase distortions associated with the process of chirping. Asymmetric poling significantly broadens the entangled source bandwidth while preserving high visibility quantum interferometric sensing.
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