Temperature-Sensitive Dual Dispersive Wave Generation ofHigher-Order Modes in Liquid-Core Fibers

in: Laser & Photonics Reviews (2023)
Scheibinger, Ramona; Hofmann, Johannes; Schaarschmidt, Kay; Chemnitz, Mario; Schmidt, Markus A.
The emission of resonant radiation from temporal solitary waves—also known as dispersive wave generation—allows efficient energy transfer to far-distant spectral domains. This coherent radiation can deliver large spectral densities at selected wavelengths once control over the individual soliton is achieved. Here, the concepts of few-mode operation and local temperature tuning are combined for precise steering of cascaded dispersive wave generation in liquid-core optical fibers. By exciting higher-order TM and TE modes with femtosecond pulses at 1600 nm, the generation of two dispersive waves tunable by up to 33 nm K−1 through adjusting a selected part of the waveguide is observed. Sophisticated soliton-driven nonlinear dynamics arising from thermally transitioning from anomalous to all-normal dispersion with temperature changes of only a few Kelvin have been found, including soliton steering, soliton breakdown, and soliton post-fission tuning. All experimental results are verified by nonlinear simulations and semi-analytic phase-matching calculations, overall providing a cost-effective and practical toolbox for discovering unexplored states of light as well as for developing dynamically tunable broadband light sources.

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