Projects per year
Abstract
Terahertz radiation offers many exciting applications noticeably in spectroscopy
and it is showing promising results in imaging, mainly for security
applications. In this project the study of using structured polymer fibers
for THz waveguiding is presented. The inspiration for the THz fiber is
taken from microstructured polymer optical fibers (mPOFs) used at optical
wavelengths for sensing and communication. The fibers investigated can be
divided into two groups, the solid core fibers and the hollow core fibers.
The solid core fibers offer the broadest bandwidth with the best dispersion
profile, while the hollow core fibers hold the promise for lowest loss but at
the cost of lower bandwidth. In both cases the fabrication and characterization
of the fibers is presented. The fibers are also investigated numerically
and the numerical results are held up against the experimental results. The
polymer material with lowest loss is Topas and all the solid core fibers are
manufactured using this material. The polymer PMMA however has higher
refractive index along with higher loss, and this higher refractive index is
utilized to achieve a large bandwidth hollow core fiber with a low air-fill
fraction. Finally, an example of an application is presented in the form
of a broadband 3-dB directional fiber coupler. The device is numerically
investigated and designed in such a way that it is manufacturable.
Original language | English |
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Place of Publication | Kgs. Lyngby, Denmark |
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Publisher | Technical University of Denmark |
Publication status | Published - Apr 2011 |
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Dive into the research topics of 'Polymer fiber waveguides for terahertz radiation'. Together they form a unique fingerprint.Projects
- 1 Finished
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Topas microstructured polymer optical fibers for biosensing and terahertz waveguides
Nielsen, K. (PhD Student), Bang, O. (Main Supervisor), Jepsen, P. U. (Supervisor), Rasmussen, H. K. (Supervisor), Lægsgaard, J. (Examiner), Koch, M. (Examiner) & Keiding, S. R. (Examiner)
Technical University of Denmark
01/02/2008 → 20/04/2011
Project: PhD