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Article Dans Une Revue Optics Communications Année : 2021

Octave-spanning coherent supercontinuum generation in a step-index tellurite fiber and towards few-cycle pulse compression at 2 μ m

Résumé

We experimentally demonstrate 140-THz bandwidth (at −20 dB) supercontinuum generation in a 10 cm-long all-normal dispersion step-index tellurite fiber pumped by a turn-key femtosecond fiber laser emitting at at a repetition rate of 19 MHz. The soliton self-frequency shifted thulium-doped fiber mode-locked laser emits initial transform-limited pulses, with 85-fs pulse duration, that are subsequently quasi-linearly chirped (over more than 50 THz) during the above nJ-level nonlinear propagation. Moreover, we numerically demonstrate the possible pulse compression down to 12 fs by means of additional linear propagation in a standard step-index fluoride fiber with anomalous dispersion.
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hal-03436989 , version 1 (19-11-2021)

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B. Kibler, A. Lemière, J.-T. Gomes, D. Gaponov, L. Lavoute, et al.. Octave-spanning coherent supercontinuum generation in a step-index tellurite fiber and towards few-cycle pulse compression at 2 μ m. Optics Communications, 2021, 488, pp.126853. ⟨10.1016/j.optcom.2021.126853⟩. ⟨hal-03436989⟩
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