Formation of Non-Classical Multiphoton States of Light with Squeezed Quantum Fluctuations in Bismuth-Modified Tellurite Glass Fibers

An optical fiber with a high Kerr nonlinearity coefficient has been proposed and manufactured from bismuth-modified tellurite glass for creation of non-classical multiphoton states of light. Specifically, we have proposed to use these 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 simulation based on the stochastic nonlinear Schrödinger equation, we have demonstrated noise squeezing stronger than –16 dB at tellurite fiber lengths of 6–14 m, while in squeezing of –14 dB is expected in silica glass fibers having lengths of 120–300 m. Analytical formulas were used to analyze the physical factors that limit the achievable squeezing.