- Tytuł:
- Terahertz dielectric characterisation of fibres in a time-domain spectrometer
- Autorzy:
-
Pacewicz, Adam
Kopyt, Paweł
Cuper, Jerzy
Krysicki, Mateusz
Salski, Bartłomiej - Powiązania:
- https://bibliotekanauki.pl/articles/2204194.pdf
- Data publikacji:
- 2023
- Wydawca:
- Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
- Tematy:
-
terahertz spectroscopy
fibre characterisation
dielectric materials - Opis:
- An innovative measurement setup for the dielectric characterisation of fibres in a terahertz time-domain spectrometer using an HDPE elliptical lens for coupling into the fibres has been built and validated by measurements of several different types of samples. The setup is based on a commercial all fibre-coupled terahertz time-domain spectrometer. Measurements of the effective refractive index have been conducted on polypropylene-based three-dimensional printing filaments, silica glass rods, and a polytetrafluoroethylene cord of lowered density, covering the frequency range of approximately 100 GHz to 1 THz. The theoretical part of the work includes numerical calculations performed via the finite difference eigenmode method and the characteristic equations of a uniform circular dielectric waveguide for a few guided modes, from which it is clear that primarily the fundamental mode propagates along the fibre. Details on model-based phase corrections, crucial to the accurate determination of the effective refractive index of dispersive fibres, have been presented as well.
- Źródło:
-
Opto-Electronics Review; 2023, 31, 2; art. no. e144596
1230-3402 - Pojawia się w:
- Opto-Electronics Review
- Dostawca treści:
- Biblioteka Nauki
Artykuł