Integrating THz quantum cascade lasers with flexible dielectric-lined hollow metallic waveguides: Moving beyond free space optics
| Autor: | Jeffrey E. Melzer, R. Wallis, Riccardo Degl'Innocenti, Oleg Mitrofanov, Carlos M. Bledt, James A. Harrington, D. S. Jessop, David A. Ritchie, Harvey E. Beere, Yuan Ren |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Distributed feedback laser
Materials science business.industry Far-infrared laser Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Waveguide (optics) law.invention 010309 optics Optics Quantum dot laser law 0103 physical sciences Optoelectronics Laser beam quality Laser power scaling 0210 nano-technology Quantum cascade laser business |
| Zdroj: | 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). |
| Popis: | We demonstrate a THz optical delivery system capable of supplying a low divergence HE 11 Gaussian beam at a distance of >500mm from the facet of a THz quantum cascade laser. This is achieved by optimising the optical coupling to an external hollow flexible polystyrene-lined Ag waveguide, by utilising a monolithically integrated cylindrical metal waveguide in the laser mounting block. This is shown to achieve >80% coupling efficiency between the two waveguides, whilst maintaining the spectral integrity of the laser. A comparison with other excitation geometries, such as bare laser excitation, as well as a laser with a facet coupled silicon lens, is also analysed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|