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Optical Engineering • new

Low-loss and single-mode tapered hollow-core waveguides optically coupled with interband and quantum cascade lasers
Author(s): Marilena Giglio; Pietro Patimisco; Angelo Sampaolo; Jason M. Kriesel; Frank K. Tittel; Vincenzo Spagnolo
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Paper Abstract

We report single-mode midinfrared laser beam delivery through a 50-cm-long tapered hollow-core waveguide (HCW) having bore diameter linearly increasing from 200 to 260  μm. We performed theoretical calculations to identify the best HCW-laser coupling conditions in terms of optical losses and single-mode fiber output. To validate our modeling, we coupled the HCW with an interband cascade laser and four quantum cascade lasers with their emission wavelengths spanning 3.5 to 7.8  μm, using focusing lenses with different focal lengths. With the best coupling conditions, we achieved single-mode output in the investigated 3.5 to 7.8  μm spectral range, with minimum transmission losses of 1.27 dB at 6.2  μm.

Paper Details

Date Published: 24 August 2017
PDF: 7 pages
Opt. Eng. 57(1) 011004 doi: 10.1117/1.OE.57.1.011004
Published in: Optical Engineering Volume 57, Issue 1
Show Author Affiliations
Marilena Giglio, Univ. degli Studi di Bari Aldo Moro (Italy)
Politecnico di Bari (Italy)
Rice Univ. (United States)
Pietro Patimisco, Univ. degli Studi di Bari Aldo Moro (Italy)
Politecnico di Bari (Italy)
Rice Univ. (United States)
Angelo Sampaolo, Univ. degli Studi di Bari Aldo Moro (Italy)
Politecnico di Bari (Italy)
Rice Univ. (United States)
Jason M. Kriesel, Opto-Knowledge Systems, Inc. (United States)
Frank K. Tittel, Rice Univ. (United States)
Vincenzo Spagnolo, Politecnico di Bari (Italy)
Univ. degli Studi di Bari Aldo Moro (Italy)


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