Spatial and Spectral Mode Selection of Heralded Single Photons From Pulsed Parametric Down Conversion
Stefania Castelletto, Ivo P. Degiovanni, V Schettini, Alan L. Migdall
We describe an experiment in which photon pairs from a pulsed parametric down-conversion source were coupled into single-mode fibers with heralding efficiencies as high as 70%. Heralding efficiency or mode preparation efficiency is defined as the probability of finding a photon in a fiber in a definite state, given the detection of its twin. Heralding efficiencies were obtained for a range of down-conversion beam size configurations. Analysis of spatial and spectral mode selection, and their mutual correlation, guides one toward a practical procedure for engineering PDC single photons in a definite mode and spectral emission. The heralded photons were analyzed spectrally, for each beam configuration, to determine the interplay between transverse momentum and spectral entanglement on the preparation efficiency.
, Degiovanni, I.
, Schettini, V.
and Migdall, A.
Spatial and Spectral Mode Selection of Heralded Single Photons From Pulsed Parametric Down Conversion, Optics Express, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=840964
(Accessed December 3, 2022)