Terahertz quantum cascade laser coupled with high efficiency to the low loss optical modes of cylindrical hollow-core waveguides

Miriam S. Vitiello; J. H. Xu; F. Beltram; A. Tredicucci; O. Mitrofanov; James A. Harrington; H. E. Beere; D. A. Ritchie

doi:10.1117/12.899132

7 September 2011 Terahertz quantum cascade laser coupled with high efficiency to the low loss optical modes of cylindrical hollow-core waveguides

Miriam S. Vitiello, J. H. Xu, F. Beltram, A. Tredicucci, O. Mitrofanov, James A. Harrington, H. E. Beere, D. A. Ritchie

Author Affiliations +

Proceedings Volume 8119, Terahertz Emitters, Receivers, and Applications II; 81190F (2011) https://doi.org/10.1117/12.899132
Event: SPIE Photonic Devices + Applications, 2011, San Diego, California, United States

Abstract

We demonstrate that azimuthally polarized micro-ring THz quantum-cascade lasers can be coupled to hollow metallic waveguides with efficiencies ≥96% and perfectly matched with the TE₀₁ waveguide mode, giving attenuation losses < 3dB/m. The use of Ag coated-flexible pipe waveguides allows propagation of either vertically polarized or azimuthally polarized QCL beams with propagation losses as low as 2.1-4.4 dB/m and bending losses lower than 1.2 dB.

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Miriam S. Vitiello, J. H. Xu, F. Beltram, A. Tredicucci, O. Mitrofanov, James A. Harrington, H. E. Beere, and D. A. Ritchie "Terahertz quantum cascade laser coupled with high efficiency to the low loss optical modes of cylindrical hollow-core waveguides", Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190F (7 September 2011); https://doi.org/10.1117/12.899132

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KEYWORDS

Waveguides

Terahertz radiation

Quantum cascade lasers

Wave propagation

Hollow waveguides

Microrings

Laser beam propagation

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