Abstract
We theoretically analyze the capability of generating broadband single-photon states in photonic crystal fibers (PCF) formed by spontaneous four-wave mixing (SFWM) using femtosecond laser pulses. The design of PCF structures with the flat dispersion profile is proposed. The characteristics of the correlated photon pairs with a broadband spectrum and low spectral correlation for these structures are calculated.
Highlights
Spontaneous four-wave mixing (SFWM) and spontaneous parametric down-conversion (SPDC) is a powerful tool for generating a wide class of non-classical states, in particular the single-photon or two-photon states [1, 2]
The basic disadvantages of the methods are the random nature of single-photon generation, that leads to a probability of obtaining the two-photon state, and a correlation between the signal and idler photons
Broadband single-photon sources based on spontaneous four-wave mixing with fiber structures are of interest for high-speed transmission of information and high agreement with fiber networks
Summary
Spontaneous four-wave mixing (SFWM) and spontaneous parametric down-conversion (SPDC) is a powerful tool for generating a wide class of non-classical states, in particular the single-photon or two-photon states [1, 2]. Specific characteristics of such sources determine possibility of its application [3]. The main advantages of these methods include high stability of obtained states in time, the possibility to generate spectrally limited pulses at room temperatures, the possibility to adjust optical wavelength and the spectrum width as well as small influence of multi-photon states. The basic disadvantages of the methods are the random nature of single-photon generation, that leads to a probability of obtaining the two-photon state, and a correlation between the signal and idler photons.
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