Control over the joint spectral amplitude of a photon pair has proved highly desirable for many quantum applications, since it contains correlations, and crucial effects on indistinguishability photons, as well promising emerging applications involving complex functions frequency encoding qudits. Until today, this been achieved by engineering single degree freedom, either custom poling nonlinear crystal or shaping pump pulse. We present combined approach where two degrees phase-matching...

We study the generation of frequency nondegenerate correlated photon pairs and heralded single photons via spontaneous four-wave mixing (SFWM) in a series identical micro- or nanofibers (MNFs). Joint spectral intensity biphoton field generated at wavelengths about 880 1310 nm has been measured under excitation by 100-ps laser pulses demonstrating good agreement with theoretical prediction. The zero-time second-order autocorrelation function was 0.2 when emission rate 4 Hz. MNF-based source...

Backward-wave spontaneous parametric down-conversion in a periodically poled potassium titanyl phosphate (KTP) crystal has been experimentally observed for the first time. The correlation and spectral characteristics of generated single-photon states are investigated.

The properties of the backward-wave spontaneous parametric down-conversion (SPDC) in a periodically poled potassium titanyl phosphate (KTP) waveguide are studied context creating narrowband heralded sources single-photon states. effective index refraction and spatial profile different modes, efficiency SPDC processes purity photons calculated numerically for given waveguide. Compared to usual co-propagating SPDC, spectral narrowing backward- wave was observed as should be expected.

We introduce a novel experimental technique to study the interference of bi-photon joint spectral amplitudes, exploring new possibilities in quantum photonics. Our approach uniquely uncovers intricate phase-dependent phenomena entangled photon spectra.

The properties of the backward-wave spontaneous parametric down-conversion (SPDC) in a periodically poled potassium titanyl phosphate (KTP) waveguide are studied context creating narrowband heralded sources single-photon states. effective index refraction and spatial profile different modes, efficiency SPDC processes purity photons calculated numerically for given waveguide. Compared to usual co-propagating SPDC, spectral narrowing was observed as should be expected. Generation biphoton...

The features of biphotons states generated via spontaneous four-wave mixing in nanofibers with a variable cross-section are studied. spectral amplitude the biphoton field is calculated and effects interference phase modulation such structures discussed.

Features of biphoton states generated via spontaneous four-wave mixing in tapered nanofibers are studied. The spectral amplitude a field is calculated and the effect interference such structures discussed. nanofiber environment on investigated.

Control over the joint spectral amplitude of a photon pair has proved highly desirable for many quantum applications, since it contains correlations, and crucial effects on indistinguishability photons, as well promising emerging applications involving complex functions frequency encoding qudits. Until today, this been achieved by engineering single degree freedom, either custom poling nonlinear crystal or shaping pump pulse. We present combined approach where two degrees phase-matching...

We studied the theoretical possibility of generating single-photon states in fibers with active profile dispersion formed by spontaneous four-wave mixing (SFWM) using femtosecond laser pulses.The eliminating spectral correlation for generated commercial was assessed.To model structure photonic crystal and modes SFWM generation, an optimization performed on parameters pump fiber structure.

In this work, spontaneous four-wave mixing in silica optical nanofibers is studied theoretically. The spectrum of generated biphoton field and its dependence on the nanofiber temperature are analysed.

Abstract Joint spectral intensity of the biphoton field generated via spontaneous four-wave mixing in an optical nanofiber was studied both experimentally and theoretically. The measured two-photon frequency distribution agrees well with theoretically expected one that is calculated taking into account spatially inhomogeneous profile taper. It shown measuring joint makes it possible to determine radius high accuracy.