Widely tunable mid-infrared fiber laser source based on soliton self-frequency shift in microstructured tellurite fiber

Abstract

A turnkey fiber laser source generating high-quality pulses with a spectral sech shape and Fourier transform-limited duration of order 100 fs widely tunable in the 1.6–2.65 μm range is presented. It is based on Raman soliton self-frequency shifting in the suspended-core microstructured ${\mathrm{TeO}}_2\text{-}{\mathrm{WO}}_3\text{-}{\mathrm{La}}_2{\mathrm{O}}_3$ glass fiber pumped by a hybrid Er/Tm fiber system. Detailed experimental and theoretical studies, which are in a very good agreement, of nonlinear pulse dynamics in the tellurite fiber with carefully measured and calculated parameters are reported. A quantitatively verified numerical model is used to show Raman soliton shift in the range well beyond 3 μm for increased pump energy.

© 2015 Optical Society of America

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