• Février, Sébastien
• Krupa, Katarzyna
• Tonello, Alessandro
• Tilouine, I.
• Leventoux, Yann
• Granger, G.
• Arosa, Y.

Abstract

<jats:p>Hyperspectral spectroscopy requires light sources with wide spectral ranges from the visible to the mid-infrared. Here, we demonstrate the first fiber-based mid-infrared supercontinuum covering three octaves of frequency by leveraging 1-µm laser technology. The process consists in spectral broadening of a 1064-nm pump toward 0.48–2.5 µm in a graded-index multimode fiber, followed by a fluoro-indate fiber used to reach deeper into the near infrared (4.3 µm). Finally, an arsenic selenide chalcogenide fiber allows us to reach the 6-µm wavelength region, providing a 0.75–6-µm supercontinuum. We illustrate the potential of this light source by recording mid-infrared absorption spectra of organic compounds.</jats:p>

Topics

• compound
• organic compound
• Arsenic
• spectroscopy