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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 3 — Feb. 1, 2006
  • pp: 308–310

Low-loss subwavelength plastic fiber for terahertz waveguiding

Li-Jin Chen, Hung-Wen Chen, Tzeng-Fu Kao, Ja-Yu Lu, and Chi-Kuang Sun  »View Author Affiliations

Optics Letters, Vol. 31, Issue 3, pp. 308-310 (2006)

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We report a simple subwavelength-diameter plastic wire, similar to an optical fiber, for guiding a terahertz wave with a low attenuation constant. With a large wavelength-to-fiber-core ratio, the fractional power delivered inside the lossy core is reduced, thus lowering the effective fiber attenuation constant. In our experiment we adopt a polyethylene fiber with a 200 μ m diameter for guiding terahertz waves in the frequency range near 0.3 THz in which the attenuation constant is reduced to of the order of or less than 0.01 cm 1 . Direct free-space coupling efficiency as high as 20% can be achieved by use of an off-axis parabolic mirror. Furthermore, all the plastic wires are readily available, with no need for complex or expensive fabrication.

© 2006 Optical Society of America

OCIS Codes
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(260.3090) Physical optics : Infrared, far

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 2, 2005
Revised Manuscript: October 14, 2005
Manuscript Accepted: October 18, 2005

Li-Jin Chen, Hung-Wen Chen, Tzeng-Fu Kao, Ja-Yu Lu, and Chi-Kuang Sun, "Low-loss subwavelength plastic fiber for terahertz waveguiding," Opt. Lett. 31, 308-310 (2006)

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