An optical parametric oscillator is used to generate photon pairs with tunable bandwidth. These photons can be made indistinguishable from photons generated by quantum dots allowing for quantum inference of photons from dissimilar sources.
© 2012 OSA
A. Ahlrichs, L. Koch, M. Kerbach, and O. J. Benson, "Photon Pairs from Cavity-Enhanced Parametric Down-Conversion with Tunable Bandwidth for Quantum Interfaces," in Research in Optical Sciences, OSA Technical Digest (Optical Society of America, 2012), paper QT3A.3.
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