An optimized photon pair source for quantum circuits

Harder G, Ansari V, Brecht B, Dirmeier T, Marquardt C, Silberhorn C (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Optics Express Optical Society of America

Book Volume: 21

Pages Range: 13975-13985

Journal Issue: 12

DOI: 10.1364/OE.21.013975

Abstract

We implement an ultrafast pulsed type-II parametric down conversion source in a periodically poled KTP waveguide at telecommunication wavelengths with almost identical properties between signal and idler. As such, our source resembles closely a pure, genuine single mode photon pair source with indistinguishable modes. We measure the joint spectral intensity distribution and second order correlation functions of the marginal beams and find with both methods very low effective mode numbers corresponding to a Schmidt number below 1.16. We further demonstrate the indistinguishability as well as the purity of signal and idler photons by Hong-Ou-Mandel interferences between signal and idler and between signal/idler and a coherent field, respectively. Without using narrowband spectral filtering, we achieve a visibility for the interference between signal and idler of 94.8% and determine a purity of more than 80% for the heralded single photon states. Moreover, we measure raw heralding efficiencies of 20.5% and 15.5% for the signal and idler beams corresponding to detector-loss corrected values of 80% and 70%. © 2013 Optical Society of America.

Authors with CRIS profile

Christoph Marquardt Institut für Optik, Information und Photonik

Involved external institutions

Universität Paderborn DE Germany (DE) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Harder, G., Ansari, V., Brecht, B., Dirmeier, T., Marquardt, C., & Silberhorn, C. (2013). An optimized photon pair source for quantum circuits. Optics Express, 21(12), 13975-13985. https://doi.org/10.1364/OE.21.013975

MLA:

Harder, Georg, et al. "An optimized photon pair source for quantum circuits." Optics Express 21.12 (2013): 13975-13985.

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