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arXiv · 2003.03864

Low-noise octave-spanning mid-infrared supercontinuum generation in a multimode chalcogenide fiber

Zahra Eslami·Piotr Ryczkowski·Lauri Salmela·Goëry Genty
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Abstract

We demonstrate the generation of a low-noise, octave-spanning mid-infrared supercontinuum from 1700 to 4800 nm by injecting femtosecond pulses into the normal dispersion regime of a multimode step-index chalcogenide fiber with 100 $\mu$m core diameter. We conduct a systematic study of the intensity noise across the supercontinuum spectrum and show that the initial fluctuations of the pump laser are at most amplified by a factor of three. We also perform a comparison with the noise characteristics of an octave-spanning supercontinuum generated in the anomalous dispersion regime of a multimode fluoride fiber with similar core size and show that the all-normal dispersion supercontinuum in the multimode chalcogenide fiber has superior noise characteristics. Our results open up novel perspective for many practical applications such as long-distance remote sensing where high power and low noise are paramount.

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Zahra Eslami, Piotr Ryczkowski, Lauri Salmela, Goëry Genty. 2020-03-08. Low-noise octave-spanning mid-infrared supercontinuum generation in a multimode chalcogenide fiber. https://doi.org/10.1364/ol.392282

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