7 March 2014 Polymeric waveguide components for THz quantum cascade laser outcoupling
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Abstract
We study the use of polymeric components to achieve efficient outcoupling of radiation from double-metal-waveguide THz quantum cascade lasers. We employ cyclicolefincopolymer to realize optical fibers with diameters between 60mm and 1000mm, and characterize their absorption coefficient at 2.9THz. We show that assembling a fiber on the facet of a singleplasmon quantum cascade laser improves its far field radiation pattern, making it narrower. We also provide a design of a broadband directional coupler that can be used to couple radiation from a doublemetal quantum cascade laser waveguide into the tapered end of a metal coated optical fiber.
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F. Castellano, F. Castellano, H. Beere, H. Beere, D. Ritchie, D. Ritchie, M. S. Vitiello, M. S. Vitiello, } "Polymeric waveguide components for THz quantum cascade laser outcoupling", Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 89851F (7 March 2014); doi: 10.1117/12.2041219; https://doi.org/10.1117/12.2041219
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