20 February 2017 Spectral correlation and interference in continuous-wave non-degenerate photon pairs at telecom wavelengths
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Abstract
We have developed an entangled photon pair source based on a domain-engineered, type-II periodically poled lithium niobate crystal that produces signal and idler photons at 1533 nm and 1567 nm. We characterized the spectral correlations of the generated entangled photons using fiber-assisted signal-photon spectroscopy. We observed interference between the two down-conversion paths after erasing polarization distinguishability of the down-converted photons. The observed interference signature is closely related to the spectral correlations between photons in a Hong- Ou-Mandel interferometer. These measurements suggest good indistinguishability between the two downconversion paths, which is required for high entanglement visibility.
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Paulina S. Kuo, Thomas Gerrits, Varun Verma, Sae Woo Nam, "Spectral correlation and interference in continuous-wave non-degenerate photon pairs at telecom wavelengths", Proc. SPIE 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X, 1011817 (20 February 2017); doi: 10.1117/12.2263389; https://doi.org/10.1117/12.2263389
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