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Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range

We demonstrated low-loss and single-mode laser beam delivery through hollow-core waveguides (HCWs) operating in the 3.7–7.6 μm spectral range. The employed HCWs have a circular cross section with a bore diameter of 200 μm and metallic/dielectric internal coatings deposited inside a glass capillary t...

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Autores principales: Patimisco, Pietro, Sampaolo, Angelo, Mihai, Laura, Giglio, Marilena, Kriesel, Jason, Sporea, Dan, Scamarcio, Gaetano, Tittel, Frank K., Spagnolo, Vincenzo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4851047/
https://www.ncbi.nlm.nih.gov/pubmed/27089343
http://dx.doi.org/10.3390/s16040533
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author Patimisco, Pietro
Sampaolo, Angelo
Mihai, Laura
Giglio, Marilena
Kriesel, Jason
Sporea, Dan
Scamarcio, Gaetano
Tittel, Frank K.
Spagnolo, Vincenzo
author_facet Patimisco, Pietro
Sampaolo, Angelo
Mihai, Laura
Giglio, Marilena
Kriesel, Jason
Sporea, Dan
Scamarcio, Gaetano
Tittel, Frank K.
Spagnolo, Vincenzo
author_sort Patimisco, Pietro
collection PubMed
description We demonstrated low-loss and single-mode laser beam delivery through hollow-core waveguides (HCWs) operating in the 3.7–7.6 μm spectral range. The employed HCWs have a circular cross section with a bore diameter of 200 μm and metallic/dielectric internal coatings deposited inside a glass capillary tube. The internal coatings have been produced to enhance the spectral response of the HCWs in the range 3.5–12 µm. We demonstrated Gaussian-like outputs throughout the 4.5–7.6 µm spectral range. A quasi single-mode output beam with only small beam distortions was achieved when the wavelength was reduced to 3.7 μm. With a 15-cm-long HCW and optimized coupling conditions, we measured coupling efficiencies of >88% and transmission losses of <1 dB in the investigated infrared spectral range.
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spelling pubmed-48510472016-05-04 Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range Patimisco, Pietro Sampaolo, Angelo Mihai, Laura Giglio, Marilena Kriesel, Jason Sporea, Dan Scamarcio, Gaetano Tittel, Frank K. Spagnolo, Vincenzo Sensors (Basel) Article We demonstrated low-loss and single-mode laser beam delivery through hollow-core waveguides (HCWs) operating in the 3.7–7.6 μm spectral range. The employed HCWs have a circular cross section with a bore diameter of 200 μm and metallic/dielectric internal coatings deposited inside a glass capillary tube. The internal coatings have been produced to enhance the spectral response of the HCWs in the range 3.5–12 µm. We demonstrated Gaussian-like outputs throughout the 4.5–7.6 µm spectral range. A quasi single-mode output beam with only small beam distortions was achieved when the wavelength was reduced to 3.7 μm. With a 15-cm-long HCW and optimized coupling conditions, we measured coupling efficiencies of >88% and transmission losses of <1 dB in the investigated infrared spectral range. MDPI 2016-04-13 /pmc/articles/PMC4851047/ /pubmed/27089343 http://dx.doi.org/10.3390/s16040533 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Patimisco, Pietro
Sampaolo, Angelo
Mihai, Laura
Giglio, Marilena
Kriesel, Jason
Sporea, Dan
Scamarcio, Gaetano
Tittel, Frank K.
Spagnolo, Vincenzo
Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range
title Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range
title_full Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range
title_fullStr Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range
title_full_unstemmed Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range
title_short Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range
title_sort low-loss coupling of quantum cascade lasers into hollow-core waveguides with single-mode output in the 3.7–7.6 μm spectral range
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4851047/
https://www.ncbi.nlm.nih.gov/pubmed/27089343
http://dx.doi.org/10.3390/s16040533
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