Instant single-photon Fock state tomography
S. R. Huisman, Nitin Jain, S. A. Babichev, Frank Vewinger, A. N. Zhang, S. H. Youn, Alexander I. Lvovsky · Optics Letters · 2009
Heralded single photons are prepared at a rate of approximately 100 kHz via conditional measurements on polarization-nondegenerate biphotons produced in a periodically poled potassium-titanyl phosphate crystal. The single-photon Fock state is characterized using high-frequency pulsed optical homodyne tomography with a fidelity of (57.6+/-0.1)%. The state preparation and detection rates allowed us to perform on-the-fly alignment of the apparatus based on real-time analysis of the quadrature measurement statistics.