NONLINEAR OPTICAL SWITCHING OF ULTRASHORT PULSES IN A TWO-CORE TELLURITE FIBER
A. V. Andrianov1, N. I. Salnikov1,2, E. A. Anashkina1, V. V. Dorofeev1,3, S. E. Motorin1,3, A. R. Sharafeev3, O. V. Timofeev3, A. G. Litvak1
1A. V. Gaponov-Grekhov Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
2Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
3G. G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhny Novgorod, Russia
Keywords: multicore fibers, nonlinear optical switches, tellurite fibers, ultrashort pulses
Abstract
In this study, a two-core fiber based on tellurite glass with interacting single-mode cores is fabricated, and the linear and nonlinear propagation of ultrashort pulses is investigated. In the fabricated fiber, the effect of nonlinear optical switching of ultrashort pulses at a wavelength of 1.56 μm is experimentally demonstrated, which manifests itself as energy redistribution between the cores at the fiber output with an increase in the energy of the input pulse launched into one of the fiber cores. The effect is observed at relatively low pulse energies of less than 2 nJ, which is of interest for the design of saturable absorbers for mode-locked fiber lasers.
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