Gerrits, T.
, Lita, A.
, Nam, S.
, Chen, C.
, Heyes, J.
, Hong, K.
, Shapiro, J.
and Wong, F.
(2019),
Indistinguishable single-mode photons from spectrally engineered biphotons, Optics Express, [online], https://doi.org/10.1364/OE.27.011626
(Accessed April 20, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Indistinguishable single-mode photons from spectrally engineered biphotons
Published
Author(s)
, , , Changchen Chen, Jane Heyes, Kyung-Han Hong, Jeffrey Shapiro, Franco N. Wong
Abstract
We use pulsed spontaneous parametric down-conversion in KTiOPO4, with a Gaussian phasematching function and a transform-limited Gaussian pump, to achieve near-unity spectral purity in heralded single photons at telecommunication wavelength. Theory shows that these phase-matching and pump conditions are sufficient to ensure that a biphoton state with a circularly symmetric joint spectral intensity profile is transform limited and factorable. We verify the heralded- state spectral purity in a four-fold coincidence measurement by performing Hong-Ou-Mandel interference between two independently generated heralded photons. With a mild spectral filter we obtain an interference visibility of 98.4{+or-}1.1% which corresponds to a heralded-state purity of 99.2%. Our heralded photon source is potentially an essential resource for measurement-based quantum information processing and quantum network applications.Citation
Optics Express
Volume
27
Pub Type
Journals
Download Paper
Keywords
quantum interference, indistinguishable photons, spontaneous parametric downconversion
Citation
Created April 15, 2019, Updated July 9, 2019