Tuning curve of type-0 spontaneous parametric down-conversion
Stefan Lerch, Bänz Bessire, Christof Bernhard, Thomas Feurer, André Stefanov · Journal of the Optical Society of America B · 2013
We study the tuning curve of entangled photons generated by type-0 spontaneous parametric down-conversion in a periodically poled potassium titanyl phosphate crystal. We demonstrate the X-shaped spatiotemporal structure of the spectrum by means of measurements and numerical simulations. Experiments for different pump waists, crystal temperatures, and crystal lengths are in good agreement with numerical simulations.