Spatial and spectral mode selection of heralded single photons from pulsed parametric down-conversion | Zendy

Stefania Castelletto | Zendy; Ivo Pietro Degiovanni | Zendy; Valentina Schettini | Zendy; Alan L. Migdall | Zendy

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Spatial and spectral mode selection of heralded single photons from pulsed parametric down-conversion

Author(s) -

Stefania Castelletto,

Ivo Pietro Degiovanni,

Valentina Schettini,

Alan L. Migdall

Publication year - 2005

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.006709

Subject(s) - spontaneous parametric down conversion , optics , photon , physics , quantum entanglement , parametric statistics , photon entanglement , energy conversion efficiency , beam (structure) , range (aeronautics) , optoelectronics , materials science , quantum , quantum mechanics , statistics , mathematics , composite material

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.

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