Bendable, low-loss Topas fibers for the terahertz frequency range

Bendable, low-loss Topas fibers for the terahertz frequency range

Nielsen, K.
Rasmussen, H.K.
Adam, A.J.L.
Planken, P.C.M.
Bang, O.
Jepsen, P.U.

Applied Sciences

Imaging Science and Technology

2009-05-06

We report on a new class of polymer photonic crystal fibers for low-loss guidance of THz radiation. The use of the cyclic olefin copolymer Topas, in combination with advanced fabrication technology, results in bendable THz fibers with unprecedented low loss and low material dispersion in the THz regime.We demonstrate experimentally how the dispersion may be engineered by fabricating both high- and low-dispersion fibers with zero-dispersion frequency in the regime 0.5-0.6 THz. Near-field, frequencyresolved characterization with high spatial resolution of the amplitude and phase of the modal structure proves that the fiber is single-moded over a wide frequency range, and we see the onset of higher-order modes at high frequencies as well as indication of microporous guiding at low frequencies and high porosity of the fiber. Transmission spectroscopy demonstrates low-loss propagation (< 0.1 dB/cm loss at 0.6 THz) over a wide frequency range.

fiber characterization
fiber design and fabrication
near-field microscopy
spectroscopy, teraherz

http://resolver.tudelft.nl/uuid:b2a74438-b2a3-4bb1-9cd4-9fca9737735d

https://doi.org/10.1364/OE.17.008592

Optical Society of America

1094-4087

http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-10-8592

Optics Express, 17 (10), 2009

Institutional Repository

journal article

(c) 2009 Optical Society of America