Generation of heralded single photons beyond 1100nm by spontaneous four-wave mixing in a side-stressed femtosecond laser-written waveguide

Zhizhong Yan, Yuwen Duan, L. G. Helt, Martin Ams, Michael J. Withford, M. J. Steel

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We demonstrate a monolithically integrable heralded photon source in a femtosecond laser direct written glass waveguide. The generation of photon pairs with a wide wavelength separation requires a concomitant large birefringence in the normal dispersion regime. Here, by incorporation of side-stress tracks, we produce a waveguide with a birefringence of 1.64 × 10 - 4 and propagation loss as low as 0.21 dB/cm near 980 nm. We measure photon pairs with 300 nm wavelength separation at an internal generation rate exceeding 5.05 × 10 6/s. The second order correlations indicate that the generated photon pairs are in a strongly non-classical regime.

Original languageEnglish
Article number231106
Pages (from-to)1-5
Number of pages5
JournalApplied Physics Letters
Issue number23
Publication statusPublished - 7 Dec 2015


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