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Applied Physics B

Site-selective measurement of relaxation properties at 980 nm in Er $$^{3+}$$ 3 + -doped congruent and stoichiometric lithium niobate crystals

Gábor Mandula, Z. Kis, L. Kovács, Zsuzsanna Szaller, Andreas Krampf

Published Mar 23, 2016• 6 citations
Publisher
DOI
10.1007/s00340-016-6341-z

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Optical Spectroscopy of an Erbium-Doped Crystal

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Site-selective measurement of relaxation properties at 980 nm in Er 3+^{3+}3+ 3 + -doped congruent and stoichiometric lithium niobate crystals
Multimode spectro-temporal non-Gaussian quantum states of light play a crucial role in continuous-variable quantum information processing. In particular, the non-Gaussian quantum states generated through a single-photon addition (SPA) to multimode quantum fields at telecommunication wavelengths constitute a useful resource for quantum technologies. We present a detailed theoretical analysis and numerical simulations of single-photon addition (SPA) and mode-selective single-photon addition (MSSPA) to a multimode quantum field at telecommunication wavelengths. The analysis is performed for congruently grown lithium niobate (LN), 5%5\%5% MgO-doped lithium niobate (MgO:LN) and various concentrations of ZnO-doped lithium niobate (ZnO:LN) bulk crystals. We investigate MSSPA using type-II parametric down-conversion (PDC) and SPA using the type-I PDC processes. We further present spectro-temporal mode-selective SPA at the telecom wavelength using 5%5\%5% MgO:LN for temperatures ranging from 0∘C0^\circ C0∘C to 15∘C15^\circ C15∘C. In addition, we perform simulations to investigate SPA based on the noncollinear type-I PDC configuration. These theoretical results identify optimal experimental conditions and phase-matching parameters to achieve SPA and mode-selective SPA for LN-based crystals, providing a potential platform for non-Gaussian quantum state engineering at telecommunication wavelengths, mainly at 155015501550 nm.