Characterization of a fiber based heralded single photon source at telecom wavelength

Nuno A. Silva; Armando N. Pinto

doi:10.1117/12.2026203

18 November 2013 Characterization of a fiber based heralded single photon source at telecom wavelength

Nuno A. Silva, Armando N. Pinto

Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 8785F0 (2013) https://doi.org/10.1117/12.2026203
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

Abstract

Single photon sources are fundamental elements for quantum information science, mainly for quantum key distribution (QKD) applications. Nevertheless, on-demand single photon sources are difficult to obtain, and their implementation in a practical application, such as QKD, demands further developments. A different approach to a single photon source is based on the generation of quantum correlated photon-pairs. In that case, the detection of one photon of the pair heralds the presence of the second photon. In this work, we present a heralded single photon source based on the spontaneous four-wave mixing (FWM) process in optical fibers. We characterize theoretically the heralded photon source by means of the conditional second-order coherence function, g_c⁽²⁾ , with g_c⁽²⁾ = 0 for a perfect single photon source. We observe the nonclassical nature of the source, with g_c⁽²⁾ ≪ 1 far below the classical limit. Our results also show that the Raman scattering in general degrades the quality of the source, due to the generation of uncorrelated photons. However, our findings show that in some frequency regimes we are able to observe a g_c⁽²⁾ ≈ 10⁻³. Moreover, our analysis shows that the propagation of the photons in a standard single mode fiber (SSMF) does not change significantly the value of g_c⁽²⁾, for distances of L < 25/α, with α the loss coefficient of the SSMF. This results can help to guide the development of single photon sources for quantum information applications.

Citation Download Citation

Nuno A. Silva and Armando N. Pinto "Characterization of a fiber based heralded single photon source at telecom wavelength", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785F0 (18 November 2013); https://doi.org/10.1117/12.2026203

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KEYWORDS

Single photon

Single mode fibers

Raman scattering

Quantum key distribution

Optical fibers

Signal processing

Single photon detectors

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