24 August 2017 Low-loss and single-mode tapered hollow-core waveguides optically coupled with interband and quantum cascade lasers
Author Affiliations +
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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Marilena Giglio, Pietro Patimisco, Angelo Sampaolo, Jason M. Kriesel, Frank K. Tittel, Vincenzo Spagnolo, "Low-loss and single-mode tapered hollow-core waveguides optically coupled with interband and quantum cascade lasers," Optical Engineering 57(1), 011004 (24 August 2017). https://doi.org/10.1117/1.OE.57.1.011004 . Submission: Received: 30 May 2017; Accepted: 1 August 2017
Received: 30 May 2017; Accepted: 1 August 2017; Published: 24 August 2017
JOURNAL ARTICLE
7 PAGES


SHARE
Back to Top