13 February 2016 Hollow-core waveguide for single-mode laser beam propagation in the spectral range of 3.7-7.3 μm
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We report the first demonstration of single-mode laser beam delivery in hollow-core waveguides (HCWs) operating in the 3.7-7.3 μm spectral range. We investigated the transmission properties of HCWs with 200 μm bore diameter and internal coatings properly designed to enhance the spectral response in the spectral range of 3-12 μm. We achieved single mode output throughout the 3.7-7.3 μm range. We measured a coupling efficiency < 90% and transmission losses as low as 1 dB, when using a 15 cm-long fiber at 3.7 μm under optimized coupling conditions between input beam and HCW.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
P. Patimisco, L. Mihai, M. Giglio, A. Sampaolo, P. P. Calabrese, J. M. Kriesel, D. Sporea, G. Scamarcio, F. K. Tittel, V. Spagnolo, "Hollow-core waveguide for single-mode laser beam propagation in the spectral range of 3.7-7.3 μm", Proc. SPIE 9755, Quantum Sensing and Nano Electronics and Photonics XIII, 97552M (13 February 2016); doi: 10.1117/12.2209533; https://doi.org/10.1117/12.2209533


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