Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of Experimental and Theoretical Physics Letters

Control of the frequency spectrum of a biphoton field due to the electro-optical effect

Konstantin G. Katamadze, Anna V. Paterova, Elena G. Yakimova, Kirill A. Balygin, S. P. Kulik

Published Oct 1, 2011• 10 citations
Publisher

Abstract

A method for controlling the spectrum of spontaneous parametric down-conversion has been implemented. This method is based on the application of the gradient of an electrostatic field to a nonlinear crystal where down-conversion occurs. Due to the electro-optical effect, i.e., the dependence of the refractive indices on the applied field, the phase-matching conditions are different along the length of the crystal and, as a result, the spectrum of the emitted biphoton field is modified.

DOI
10.1134/s0021364011160089

Related papers

Control of the spectrum of the biphoton field

Konstantin G. Katamadze, S. P. Kulik

The main methods for controlling the biphoton field, as well as the problems for which the width and the shape of the spectrum of the biphoton field are of decisive importance, are discussed. The method for controlling the spectrum of the spontaneous parametric downconversion of light based on the spatial modulation of the refractive indices of a nonlinear crystal in which the generation of biphotons has been analyzed. Modulation is due to the thermo-optic and electro-optic effects.

arXiv:1104.0409•Journal of Experimental and Theoretical Physics•Jan 1, 2011•18 citations

Controlling the spectrum of a two-photon field: Inhomogeneous broadening due to a temperature gradient

Dmitry A. Kalashnikov, Konstantin G. Katamadze, S. P. Kulik

A method is proposed and implemented for controlling the spectrum of spontaneous parametric down-conversion. The method is based on generating a temperature gradient along a nonlinear crystal in which biphotons are generated. In this case, the phase-synchronism conditions are modified due to the temperature dependence of the refractive indices. As a result, the spectral composition of the emitted two-photon field is changed.

Journal of Experimental and Theoretical Physics Letters•May 1, 2009•14 citations

Chirped Biphotons Using Quasi Phase Matching

Steven Sensarn, Stephen E. Harris

We describe techniques for numerically simulating broadband, time-energy entangled biphoton generation by spontaneous parametric down conversion in quasi-phase-matched nonlinear crystals. Typical domain errors have negligible effect on the phase spectrum of the biphoton wavefunction.

Nonlinear Optics•Jan 1, 2007•0 citations

Generation of broadband biphotons and their compression in an optical fiber

G. Kh. Kitaeva, Maria V. Chekhova, O. A. Shumilkina

The generation of biphoton wave packets with a broad spectrum owing to quasi-phase-matched spontaneous parametric down-conversion in a crystal with an aperiodic poling has been considered. Biphotons at the exit of such a sample are not Fourier limited; i.e., their correlation time is much larger than the inverse width of the spectrum. It has been shown that if the inverse grating vector varies linearly along the sample length, the generated biphoton wave packets can be compressed in time by transmitting two-photon light through an optical fiber.

Journal of Experimental and Theoretical Physics Letters•Oct 1, 2009•7 citations

Frequency stabilization of a single-photon source based on spontaneous parametric down-conversion by an external electric field

D O Akat’ev, А. А. Калачев

In this paper, we examine a method of controlling the spectrum of spontaneous parametric down-conversion in crystals with quadratic nonlinearity by an external homogeneous electric field via the Pockels effect, and discuss the possibility of stabilizing the carrier frequency of the corresponding single-photon source based on backward-wave spontaneous parametric down-conversion.

Computer Optics•Jan 1, 2016•2 citations

BIPHOTON WAVE PACKETS GENERATED IN APERIODICALLY POLED CRYSTALS

G. Kh. Kitaeva, Sergey Kovalev, Kirill A. Kuznetsov

The influence of disordering of quasi-phase-matched structures on the properties of biphoton fields generated by spontaneous parametric down-conversion in periodically poled crystals is studied in the general form, taking into consideration arbitrary one-dimensional spatial distribution of the crystal second-order susceptibility. It is shown that the spectral amplitudes of the biphoton wave function become complex and gain frequency- and angle-dependent phase shifts in the structures with unequal lengths of domains. Effects of the spectrum broadening and the phase shifting are expressed in terms of the crystal non-linear transfer function. Spectrum of the first-order correlation function is found to be strictly dependent on the transfer function module, but insensitive to the phase shifts. Availability of the phase shifts makes the second-order temporal correlation function of the broadened as-generated biphoton field to be almost the same as in case of a single-domain crystal. At the same time, possibility of strong temporal biphoton compression appears further if an additional phase-compensating element is placed after the aperiodically poled crystal.

International Journal of Quantum Information•Jan 1, 2009•2 citations
A method for controlling the spectrum of spontaneous parametric down-conversion has been implemented. This method is based on the application of the gradient of an electrostatic field to a nonlinear crystal where down-conversion occurs. Due to the electro-optical effect, i.e., the dependence of the refractive indices on the applied field, the phase-matching conditions are different along the length of the crystal and, as a result, the spectrum of the emitted biphoton field is modified.
The generation of biphoton wave packets with a broad spectrum owing to quasi-phase-matched spontaneous parametric down-conversion in a crystal with an aperiodic poling has been considered. Biphotons at the exit of such a sample are not Fourier limited; i.e., their correlation time is much larger than the inverse width of the spectrum. It has been shown that if the inverse grating vector varies linearly along the sample length, the generated biphoton wave packets can be compressed in time by transmitting two-photon light through an optical fiber.
The influence of disordering of quasi-phase-matched structures on the properties of biphoton fields generated by spontaneous parametric down-conversion in periodically poled crystals is studied in the general form, taking into consideration arbitrary one-dimensional spatial distribution of the crystal second-order susceptibility. It is shown that the spectral amplitudes of the biphoton wave function become complex and gain frequency- and angle-dependent phase shifts in the structures with unequal lengths of domains. Effects of the spectrum broadening and the phase shifting are expressed in terms of the crystal non-linear transfer function. Spectrum of the first-order correlation function is found to be strictly dependent on the transfer function module, but insensitive to the phase shifts. Availability of the phase shifts makes the second-order temporal correlation function of the broadened as-generated biphoton field to be almost the same as in case of a single-domain crystal. At the same time, possibility of strong temporal biphoton compression appears further if an additional phase-compensating element is placed after the aperiodically poled crystal.