High-efficiency frequency conversion in the single-photon regime

Alex S. Clark*, Shayan Shahnia, Matthew J. Collins, Chunle Xiong, Benjamin J. Eggleton

*Corresponding author for this work

Research output: Contribution to journalArticle

42 Citations (Scopus)


In this Letter we demonstrate frequency conversion in the single-photon regime through Bragg-scattering four-wave mixing with near-unit efficiency in a 750 m long commercially available dispersion-engineered highly nonlinear fiber, where all photons and pump laser frequencies are in the low-loss telecommunications band. We achieve 99.1% ± 4.9% downconversion and 98.0% ± 5.0% upconversion of photons by 12 nm using a weak coherent state with an average input of 0.27 photons per detection gate window.

Original languageEnglish
Pages (from-to)947-949
Number of pages3
JournalOptics Letters
Issue number6
Publication statusPublished - 15 Mar 2013
Externally publishedYes

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