## Generation of non-classical correlated photon pairs via a ladder-type atomic configuration: theory and experiment |

Optics Express, Vol. 20, Issue 10, pp. 11433-11444 (2012)

http://dx.doi.org/10.1364/OE.20.011433

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### Abstract

We experimentally generate a non-classical correlated two-color photon pair at 780 and 1529.4 nm in a ladder-type configuration using a hot ^{85}Rb atomic vapor with the production rate of ~10^{7}/s. The non-classical correlation between these two photons is demonstrated by strong violation of Cauchy-Schwarz inequality by the factor R = 48 ± 12. Besides, we experimentally investigate the relations between the correlation and some important experimental parameters such as the single-photon detuning, the powers of pumps. We also make a theoretical analysis in detail and the theoretical predictions are in reasonable agreement with our experimental results.

© 2012 OSA

**OCIS Codes**

(190.7220) Nonlinear optics : Upconversion

(270.1670) Quantum optics : Coherent optical effects

(190.4223) Nonlinear optics : Nonlinear wave mixing

**ToC Category:**

Quantum Optics

**History**

Original Manuscript: February 9, 2012

Revised Manuscript: March 21, 2012

Manuscript Accepted: April 26, 2012

Published: May 4, 2012

**Citation**

Dong-Sheng Ding, Zhi-Yuan Zhou, Bao-Sen Shi, Xu-Bo Zou, and Guang-Can Guo, "Generation of non-classical correlated photon pairs via a ladder-type atomic configuration: theory and experiment," Opt. Express **20**, 11433-11444 (2012)

http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-10-11433

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