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By simultaneously measuring individual and coincidence counts of two single photon detectors connected to a fiber-based entangled photon source and fitting the results with a theoretical model of the photon generation rates, we determine the average number of polarization-entangled photon pairs generated by four-wave mixing and the average number of noise photons generated by Raman scattering and self-phase modulation of the pump as a function of power. In contrast to previous efforts to characterize fiber-based entangled photon sources, this method does not require additional coherence-based measurements to distinguish SPM photons from FWM and Raman-scattered photons.
Atiyya A. Davis,Brian T. Kirby,Thomas A. Searles, andDaniel E. Jones
"Characterizing the noise output by a fiber-based entangled photon source", Proc. SPIE 12692, Quantum Communications and Quantum Imaging XXI, 1269203 (3 October 2023); https://doi.org/10.1117/12.2676877
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Atiyya A. Davis, Brian T. Kirby, Thomas A. Searles, Daniel E. Jones, "Characterizing the noise output by a fiber-based entangled photon source," Proc. SPIE 12692, Quantum Communications and Quantum Imaging XXI, 1269203 (3 October 2023); https://doi.org/10.1117/12.2676877