Nonclassical 2-photon interference with separate intrinsically narrowband fibre sources

M Halder, J Fulconis, B Cemlyn, A Clark, C Xiong, William J Wadsworth, J G Rarity

Research output: Contribution to journalArticlepeer-review

121 Citations (SciVal)


In this paper, we demonstrate a source of photon pairs based on four-wave-mixing in photonic crystal fibres. Careful engineering of the phase matching conditions in the fibres enables us to create photon pairs at 597 nm and 860 nm in an intrinsically factorable state showing no spectral correlations. This allows for heralding one photon in a pure state and hence renders narrow band filtering obsolete. The source is narrow band, bright and achieves an overall detection efficiency of up to 21% per photon. For the first time, a Hong-Ou-Mandel interference with unfiltered photons from separate fibre sources is presented.
Original languageEnglish
Pages (from-to)4670-4676
Number of pages7
JournalOptics Express
Issue number6
Early online date9 Mar 2009
Publication statusPublished - 16 Mar 2009


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