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Ultratunable Quantum Frequency Conversion in Photonic Crystal Fiber

Kent Bonsma-Fisher, Philip J. Bustard, Charlotte Parry, Tom Wright, Duncan G. England, Benjamin Sussman, Peter J. Mosley

Published Jan 1, 2023• 0 citations
Publisher

Abstract

We achieve ultrabroad quantum frequency conversion in a photonic crystal fiber, converting a 1,551 nm heralded single photon to one with wavelengths spanning the range 1,226 - 1,483 nm. We confirm non-classical timing correlations with the herald photon, and for conversion to 1,300 nm we measure a g(2)(0) t,t = 0.25(6).
DOI
10.1364/cleo_fs.2023.ff2l.7

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Quantum frequency conversion of single photons between wavelength bands is a key enabler to realizing widespread quantum networks. We demonstrate the quantum frequency conversion of a heralded 1551 nm photon to any wavelength within an ultrabroad (1226-1408 nm) range in a group-velocity-symmetric photonic crystal fiber, covering over 150 independent frequency bins. The target wavelength is controlled by tuning only a single pump laser wavelength. We find internal, and total, conversion efficiencies of 12(1)% and 1.4(2)%, respectively. For the case of converting 1551 to 1300 nm we measure a heralded g^{(2)}(0)=0.25(6) for converted light from an input with g^{(2)}(0)=0.034(8). We expect that this photonic crystal fiber can be used for myriad quantum networking tasks.
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