International Scientific and Technical Conference "Ultrafast Optical Phenomena". October 4-8, 2021, Moscow
Statistical optics

Formation of nonclassical multiphoton states of light with squeezed quantum fluctuations in bismuth-modified tellurite glass fibers

A. A. Sorokin^a, V. V. Dorofeev^ab, S. E. Motorin^ab, I. Lyashuk^c, J. Porins^c, G. Leuchs^ad, V. Bobrovs<sup>c

a</sup> Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod
^b Institute of Chemistry of High-Purity Substances RAS, Nizhnii Novgorod
^c Riga Technical University, Institute of Telecommunications, 1048 Riga, Latvia
^d Max Planck Institute for the Science of Light, D-91058 Erlangen, Germany

Abstract: An optical fiber with a high Kerr nonlinearity coefficient is proposed and produced from a bismuth-modified tellurite glass for creation of nonclassical multiphoton states of light. Specifically, we propose to use those fibers to squeeze the quantum fluctuations of one of the quadratures of light in the 20 W signal significantly below -10 dB compared to the standard quantum noise limit, which is important for various practical applications. Using numerical modeling based on stochastic nonlinear Schrödinger equation, we demonstrate noise squeezing stronger than -16 dB for lengths of tellurite fiber 6–14 m, while squeezing of -14 dB is expected in silica fibers for lengths of 120–300 m. Analytical formulas were used to analyse the physical factors which limit the squeezing achievable.

Keywords: quantum noise squeezing, Kerr nonlinearity, optical fiber, stochastic nonlinear Schrödinger equation, bismuth-modified tellurite glasses.

Received: 20.12.2021
Revised: 20.12.2021
Accepted: 30.12.2021

DOI: 10.21883/OS.2022.04.52270.54-21

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