Polymeric waveguide components for THz quantum cascade laser outcoupling

F. Castellano; H. Beere; D. Ritchie; M. S. Vitiello

doi:10.1117/12.2041219

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7 March 2014 Polymeric waveguide components for THz quantum cascade laser outcoupling

F. Castellano; H. Beere; D. Ritchie; M. S. Vitiello

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Proceedings Volume 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII; 89851F (2014) https://doi.org/10.1117/12.2041219
Event: SPIE OPTO, 2014, San Francisco, California, United States

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, H. Beere, D. Ritchie, and 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); https://doi.org/10.1117/12.2041219

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