Spatial and spectral mode selection of heralded single photons from pulsed parametric down-donversion
AuthorCastelletto, S; Degiovanni, IP; Schettini, V
Source TitleOptics Express
PublisherOPTICAL SOC AMER
University of Melbourne Author/sCastelletto, Stefania
Document TypeJournal Article
CitationsCastelletto, S., Degiovanni, I. P. & Schettini, V. (2005). Spatial and spectral mode selection of heralded single photons from pulsed parametric down-donversion. OPTICS EXPRESS, 13 (18), pp.6709-6722. https://doi.org/10.1364/OPEX.13.006709.
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C1 - Journal Articles Refereed
We describe an experiment in which photon pairs from a pulsed parametric down-conversion (PDC) 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, provides a practical guide for engineering PDC-produced single photons in a definite mode and spectral emission band. The spectrum of the heralded photons were measured for each beam configuration, to determine the interplay between transverse momentum and spectral entanglement on the preparation efficiency.
KeywordsOptics and Opto-electronic Physics ; Physical Sciences
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