Spectral correlation and interference in continuous-wave non-degenerate photon pairs at telecom wavelengths
Paulina S. Kuo, Thomas Gerrits, Varun B. Verma, Sae Woo Nam
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.
, Gerrits, T.
, Verma, V.
and Nam, S.
Spectral correlation and interference in continuous-wave non-degenerate photon pairs at telecom wavelengths, SPIE Photonics West, San Francisco, CA, [online], https://doi.org/10.1117/12.2263389
(Accessed October 24, 2021)