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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 10 — May. 11, 2009
  • pp: 8592–8601

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

Kristian Nielsen, Henrik K. Rasmussen, Aurèle J. L. Adam, Paul C. M. Planken, Ole Bang, and Peter Uhd Jepsen  »View Author Affiliations


Optics Express, Vol. 17, Issue 10, pp. 8592-8601 (2009)
http://dx.doi.org/10.1364/OE.17.008592


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Abstract

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, frequency-resolved 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.

© 2009 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(180.4243) Microscopy : Near-field microscopy
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 16, 2009
Revised Manuscript: May 4, 2009
Manuscript Accepted: May 4, 2009
Published: May 6, 2009

Citation
Kristian Nielsen, Henrik K. Rasmussen, Aurèle J. Adam, Paul C. Planken, Ole Bang, and Peter U. Jepsen, "Bendable, low-loss Topas fibers for the terahertz frequency range," Opt. Express 17, 8592-8601 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-10-8592


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