Intrinsically narrowband pair photon generation in microstructured fibres

Olivier Alibart (1) , Alex Clark (2) , Bryn Bell (2) , Jérémie Fulconis (2) , Matthäus M Halder (2) , Ben Cemlyn (2) , Chunle Xiong (3) , William J Wadsworth (3) , John G Rarity (2)

1 LPMC - Laboratoire de physique de la matière condensée
2 CCR - Centre for Communications Research, Department of Electrical and Electronic Engineering
3 CPPM - Centre for Photonics and Photonic Materials [Bath]

In this paper, we study the tailoring of photon spectral properties generated by four-wave mixing in a birefringent photonic crystal fibre (PCF). The aim is to produce intrinsically narrow-band photons and hence to achieve high non-classical interference visibility and generate high-fidelity entanglement without any requirement for spectral filtering, leading to high effective detection efficiencies. We show unfiltered Hong-Ou-Mandel interference visibilities of 77% between photons from the same PCF and 80% between separate sources. We compare results from modelling the PCF to these experiments and analyse photon purities.

Mots clés: microstructured fibre; photon pair; quantum information

Domaines: Physique Quantique [quant-ph]

Olivier Alibart, Alex Clark, Bryn Bell, Jérémie Fulconis, Matthäus M Halder, et al.. Intrinsically narrowband pair photon generation in microstructured fibres. New Journal of Physics, 2011, 13 (6), pp.065009. ⟨10.1088/1367-2630/13/6/065009⟩. ⟨hal-00858378⟩