Photon-pair Generation in Chalcogenide Glass - Role of Waveguide Linear Absorption

Nuno A. Silva, Armando N. Pinto

Abstract

We investigate the impact of waveguide loss on the generation rate of quantum correlated photon-pairs through four-wave mixing in a chalcogenide glass fiber. The obtained results are valid even when the photon-pairs are generated in a medium with non-negligible loss, αL>> 1. The impact of the loss is quantified through the analysis of the true, total and accidental counting rates at waveguide output. We use the coincidence-to- accidental ratio (CAR) as a figure of merit of the photon-pair source. Results indicate that, the CAR parameter tends to decrease with the increase of the waveguide length, until L < 1/α. However, a continuous increase of the waveguide length tends to lead to an increase on the CAR value. In that non-negligible loss regime, αL>>1, we are able to observe a significant decrease on the value of all coincidence counting rates. Nevertheless, that decrease is even more pronounced on the accidental counting rate. Moreover, for waveguide length L = 10/α we are able to obtain a CAR of the order of 70, which is higher than the CAR value for the specific case of α = 0 with L = 2 cm, i.e. CAR=42. This indicates that the waveguide loss can improve the degree of quantum correlation between the photon-pairs.

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Paper Citation


in Harvard Style

A. Silva N. and N. Pinto A. (2014). Photon-pair Generation in Chalcogenide Glass - Role of Waveguide Linear Absorption . In Proceedings of 2nd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-008-6, pages 5-10. DOI: 10.5220/0004651400050010


in Bibtex Style

@conference{photoptics14,
author={Nuno A. Silva and Armando N. Pinto},
title={Photon-pair Generation in Chalcogenide Glass - Role of Waveguide Linear Absorption},
booktitle={Proceedings of 2nd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2014},
pages={5-10},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004651400050010},
isbn={978-989-758-008-6},
}


in EndNote Style

TY - CONF
JO - Proceedings of 2nd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Photon-pair Generation in Chalcogenide Glass - Role of Waveguide Linear Absorption
SN - 978-989-758-008-6
AU - A. Silva N.
AU - N. Pinto A.
PY - 2014
SP - 5
EP - 10
DO - 10.5220/0004651400050010