High brightness, tunable biphoton source at 976 nm for quantum spectroscopy

Optics Express
Andreas JechowRalf Menzel

Abstract

A compact all solid state continuous-wave biphoton source, tunable around 488 nm, for quantum spectroscopic applications based on a frequency doubled diode laser system is presented. Copolarized photon pairs in the fundamental transversal mode could be generated at 976 nm by spontaneous parametric down conversion inside a type-0 quasi phase matched periodically poled lithium niobate waveguide crystal with an efficiency of 8-10(-6). A high flux rate greater than 10(7) photon pairs per second has been achieved at pump powers in the muW range resulting in more than 7-10(9) photon pairs/s-mW. Further a detailed investigation of the spectral behavior and the flux rate as a function of the detuning from the degenerated case is presented.

References

May 1, 1990·Physical Review. a·J Javanainen, P L Gould
Aug 5, 1991·Physical Review Letters·A K Ekert
Dec 22, 2006·The Journal of Physical Chemistry. B·Dong-Ik Lee, Theodore Goodson
Jan 26, 2004·Optics Express·Pavel TrojekCh Kurtsiefer
Nov 12, 2007·Optics Express·Alessandro FedrizziAnton Zeilinger

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