Mid-infrared supercontinuum covering the 1.4–13.3 μm molecular fingerprint region using ultra-high NA chalcogenide step-index fibre

Mid-infrared supercontinuum generation with a record-breaking spectral coverage of 1.4–13.3 µm is demonstrated by launching intense ultra-short pulses into short pieces of ultra-high numerical aperture step-index chalcogenide glass optical fibre consisting of a GaAsSe cladding and an As 2 Se 3 core....

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Veröffentlicht in:Nature photonics 2014-11, Vol.8 (11), p.830-834
Hauptverfasser: Petersen, Christian Rosenberg, Møller, Uffe, Kubat, Irnis, Zhou, Binbin, Dupont, Sune, Ramsay, Jacob, Benson, Trevor, Sujecki, Slawomir, Abdel-Moneim, Nabil, Tang, Zhuoqi, Furniss, David, Seddon, Angela, Bang, Ole
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container_issue 11
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container_title Nature photonics
container_volume 8
creator Petersen, Christian Rosenberg
Møller, Uffe
Kubat, Irnis
Zhou, Binbin
Dupont, Sune
Ramsay, Jacob
Benson, Trevor
Sujecki, Slawomir
Abdel-Moneim, Nabil
Tang, Zhuoqi
Furniss, David
Seddon, Angela
Bang, Ole
description Mid-infrared supercontinuum generation with a record-breaking spectral coverage of 1.4–13.3 µm is demonstrated by launching intense ultra-short pulses into short pieces of ultra-high numerical aperture step-index chalcogenide glass optical fibre consisting of a GaAsSe cladding and an As 2 Se 3 core. The mid-infrared spectral region is of great technical and scientific interest because most molecules display fundamental vibrational absorptions in this region, leaving distinctive spectral fingerprints 1 , 2 . To date, the limitations of mid-infrared light sources such as thermal emitters, low-power laser diodes, quantum cascade lasers and synchrotron radiation have precluded mid-infrared applications where the spatial coherence, broad bandwidth, high brightness and portability of a supercontinuum laser are all required. Here, we demonstrate experimentally that launching intense ultra-short pulses with a central wavelength of either 4.5 μm or 6.3 μm into short pieces of ultra-high numerical-aperture step-index chalcogenide glass optical fibre generates a mid-infrared supercontinuum spanning 1.5 μm to 11.7 μm and 1.4 μm to 13.3 μm, respectively. This is the first experimental demonstration to truly reveal the potential of fibres to emit across the mid-infrared molecular ‘fingerprint region’, which is of key importance for applications such as early cancer diagnostics 3 , gas sensing 2 , 4 and food quality control 5 .
doi_str_mv 10.1038/nphoton.2014.213
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subjects 147/135
639/624/1075/1082
639/624/1075/187
639/624/400/1119
639/624/400/385
Applied and Technical Physics
Chalcogenides
Emitters
Fibres
Fingerprints
Glass
Laser diodes
letter
Photonics
Physics
Quantum Physics
Spectra
Synchrotron radiation
title Mid-infrared supercontinuum covering the 1.4–13.3 μm molecular fingerprint region using ultra-high NA chalcogenide step-index fibre
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