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Mid-infrared supercontinuum generation in fluoroindate fiber

2013; Optica Publishing Group; Volume: 38; Issue: 22 Linguagem: Inglês

10.1364/ol.38.004683

1539-4794

F. Théberge, J.-F. Daigle, Vincent Denis, Pierre Mathieu, Jean Fortin, Bruno E. Schmidt, Nicolas Thiré, François Légaré,

Optical Network Technologies

We report the generation of mid-infrared supercontinua in a step-index fluoroindate-based fiber. The large core of the fluoroindate fiber allows the guiding of multiwatt laser power over a broad spectral range. These fibers exhibit zero dispersion at 1.83 μm, minimal loss of 0.1 dB/m at 3.2 μm up to only 0.8 dB/m at 5 μm. These specifications enable mid-infrared supercontinuum generation and propagation with low loss. By using mid-infrared ultrashort laser pulses from an optical parametric amplifier, we demonstrate generation of a 20 dB spectral flatness supercontinua from 2.7 to 4.7 μm in the fluoroindate fiber, which is twice the spectral broadening compared to a ZBLAN fiber under similar conditions.