Open AccessAn experimental setup to generate narrowband bi-photons via four-wave mixing in cold atoms
Author(s) -
N. Arias-Tellez,
I. F. Ángeles-Aguillón,
D. Martínez-Cara,
A. Martínez-Vallejo,
L. Y. Villegas Aguilar,
L. A. Mendoza-López,
Yezid Torres,
R. A. Gutiérrez-Arenas,
R. Jáuregui,
I. Pérez-Castillo,
Alessandro Cerè,
Daniel Sahagún Sánchez
Publication year - 2022
Publication title -
revista mexicana de física/revista mexicana de física
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.181
H-Index - 25
eISSN - 2683-2224
pISSN - 0035-001X
DOI - 10.31349/revmexfis.68.031303
Subject(s) - physics , photon , narrowband , mixing (physics) , interferometry , brightness , coherence (philosophical gambling strategy) , four wave mixing , quantum , optics , ultracold atom , quantum optics , atomic physics , quantum mechanics , laser , nonlinear optics
We present our recently-built experimental setup designed to generate near-infrared and narrow-band correlated photon pairs by inducingfour-wave mixing in a cold gas of 87Rb atoms confined in a magneto-optical trap. The experimental setup and its automation and control approach are described in detail. A characterization of the optical density of the atomic ensemble as well as the basic statistical measurements of the generated light are reported. The non-classical nature of the photons pairs is confirmed by observing a violation of Cauchy-Schwarz inequality by a factor of 5.6 × 10 5 in a Hanbury Brown – Twiss interferometer. A 1/e coherence time for the heralded, idler photons of 4.4 ± 0.1 ns is estimated from our observations. We are able to achieve a value of 104 s−1pair-detection-rate, which results in a spectral brightness of 280 (MHz s)−1. The combination of high brightness and narrow-band spectrum makes this photon-pair source a viable tool in fundamental studies of quantum states and opens the door to use them in quantum technologies.