Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Publication date | 28/11/2016 |
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Host publication | 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 |
Publisher | IEEE Computer Society |
Number of pages | 2 |
Volume | 2016-November |
ISBN (electronic) | 9781467384858 |
ISBN (print) | 9781467384865 |
<mark>Original language</mark> | English |
Event | 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 - Copenhagen, Denmark Duration: 25/09/2016 → 30/09/2016 |
Conference | 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 |
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Country/Territory | Denmark |
City | Copenhagen |
Period | 25/09/16 → 30/09/16 |
Conference | 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 |
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Country/Territory | Denmark |
City | Copenhagen |
Period | 25/09/16 → 30/09/16 |
We demonstrate a THz optical delivery system capable of supplying a low divergence HE11 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.