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We report on the Raman response function and the soliton self-frequency shift in a tellurite microstructured fiber pumped at 1557 nm. The Raman response function in a tellurite fiber quantifies a contribution of the Raman fraction to the nonlinear optical response. Continuous soliton wavelength shift from 1582 to 1851 nm is observed in a tellurite microstructured optical fiber with the length of 6.5 cm. The experimental results strongly correlated with the numerical simulations based on a generalized nonlinear Schrödinger equation.