Guiding a terahertz quantum cascade laser into low-loss hollow waveguides

Author

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

Author_Institution

IFAC, CNR, Sesto Fiorentino, Italy

fYear

2011

fDate

2-7 Oct. 2011

Firstpage

1

Lastpage

2

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.

Keywords

light polarisation; micro-optics; optical waveguides; quantum cascade lasers; Ag coated-flexible pipe waveguides; attenuation losses; azimuthally polarized QCL beams; azimuthally polarized microring; hollow metallic waveguides; low-loss hollow waveguides; terahertz quantum cascade laser; vertically polarized QCL beams; Hollow waveguides; Laser beams; Loss measurement; Measurement by laser beam; Optical waveguides; Quantum cascade lasers; Waveguide lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on

Conference_Location

Houston, TX

ISSN

2162-2027

Print_ISBN

978-1-4577-0510-6

Electronic_ISBN

2162-2027

Type

conf

DOI

10.1109/irmmw-THz.2011.6105177

Filename

6105177