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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 27, Iss. 11 — Jun. 1, 2009
  • pp: 1489–1495

Subwavelength Dielectric-Fiber-Based THz Coupler

Hung-Wen Chen, Chui-Min Chiu, Chih-Hsien Lai, Jeng-Liang Kuo, Po-Jui Chiang, Yuh-Jing Hwang, Hung-Chun Chang, and Chi-Kuang Sun

Journal of Lightwave Technology, Vol. 27, Issue 11, pp. 1489-1495 (2009)

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We demonstrate a terahertz (THz) directional coupler for future THz applications including THz power dividers, THz communications, and THz fiber-endoscopes. By using subwavelength polyethylene fibers, we successfully established a single-mode fiber-based THz directional coupler. Unlike traditional directional couplers, the demonstrated subwavelength directional fiber coupler shows less dependency on the overlapped length of two fibers and the delivered THz frequency in our interested minimal-attenuation wavelength regime. By tuning the geometry, we also show the feasibility to control the coupling ratio.

© 2009 IEEE

Hung-Wen Chen, Chui-Min Chiu, Chih-Hsien Lai, Jeng-Liang Kuo, Po-Jui Chiang, Yuh-Jing Hwang, Hung-Chun Chang, and Chi-Kuang Sun, "Subwavelength Dielectric-Fiber-Based THz Coupler," J. Lightwave Technol. 27, 1489-1495 (2009)

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  1. R. Mendis, D. Grischkowsky, "Plastic ribbon THz waveguides," J. Appl. Phys. 88, 4449-4451 (2000).
  2. H. Han, H. Park, M. Cho, J. Kim, "Terahertz pulse propagation in a plastic photonic crystal fiber," Appl. Phys. Lett. 80, 2634 (2002).
  3. M. Skorobogatiy, A. Dupuis, "Ferroelectric all-polymer hollow Bragg fibers for terahertz guidance," Appl. Phys. Lett. 90, 113514 (2007).
  4. J. Harrington, R. George, P. Pedersen, E. Mueller, "Hollow polycarbonate waveguides with inner Cu coatings for delivery of terahertz radiation," Opt. Express 21, 5263-5268 (2004).
  5. K. Wang, D. M. Mittleman, "Metal wires for terahertz waveguiding," Nature 432, 376-379 (2004).
  6. R. Mendis, D. Grischkowsky, "Undistorted guided-wave propagation of subpicosecond terahertz pulses," Opt. Lett. 26, 846-848 (2001).
  7. L.-J. Chen, H.-W. Chen, T.-F. Kao, J.-Y. Lu, C.-K. Sun, "Low-loss subwavelength plastic fiber for terahertz waveguiding," Opt. Lett. 31, 308-310 (2006).
  8. H.-W. Chen, Y.-T. Li, J.-L. Kuo, J.-Y. Lu, L.-J. Chen, C.-K. Sun, "Investigation on spectral loss characteristics of subwavelength THz fibers," Opt. Lett. 32, 1017-1019 (2007).
  9. R. I. Hunter, D. A. Robertson, P. Goy, G. M. Smith, "Design of high-performance millimeter wave and sub-millimeter wave quasi-optical isolators and circulators," IEEE Trans. Microw. Theory Tech. 55, 890-898 (2007).
  10. F. Bilodeau, K. O. Hill, D. C. Johnson, S. Faucher, "Compact, low-loss, fused biconical taper couplers: Overcoupled operation and antisymmetric supermode cutoff," Opt. Lett. 12, 634-636 (1987).
  11. A. G. Bulushev, Y. V. Gurov, E. M. Dianov, A. V. Kuznetsov, O. G. Okhotnikov, V. M. Paranomov, "Spectral and polarization selective fiber-optic elements," J. Lightw. Technol. 6, 1575-1585 (1988).
  12. É. I. Alekseev, E. N. Bazarov, "Enhancement of the precision of fiber-optic interferometers by using couplers with high spectral power or antisymmetric supermode cutoff," Tech. Phys. Lett. 23, 568-569 (1997).
  13. H. A. Haus, Waves and Fields in Optoelectronics (Prentice-Hall, 1984).
  14. A. W. Snyder, J. D. Love, Optical Waveguide Theory (Chapman and Hall, 1983).
  15. J. A. Deibel, K. Wang, M. D. Escarra, D. Mittleman, "Enhanced coupling of terahertz radiation to cylindrical wire waveguides," Opt. Express 14, 279-290 (2006).
  16. K. Wang, D. M. Mittleman, "Guided propagation of terahertz pulses on metal wires," J. Opt. Soc. Am. B 22, 2001-2008 (2005).
  17. P. J. Chiang, C. P. Yu, H. C. Chang, "Analysis of two-dimensional photonic crystals using a multidomain pseudospectral method," Phys. Rev. E 75, 026703 (2007).
  18. P. J. Chiang, C. L. Wu, C. H. Teng, C. S. Yang, H. C. Chang, "Full-vectorial optical waveguide mode solvers using multidomain pseudospectral frequency-domain (PSFD) formulations," IEEE J. Quant. Electron. 44, 56-66 (2008).
  19. A. Ziabicki, Fundamentals of Fibre Formation (Wiley, 1976).
  20. T. W. Crowe, W. L. Bishop, D. W. Porterfield, J. L. Hesler, R. M. Weikle, "Opening the terahertz window with integrated diode circuits," IEEE J. Solid States Circuits 40, 2104-2110 (2005).
  21. J. E. Carlstrom, R. L. Plambeck, D. D. Thornton, "A continuously tunable 65–115 GHz Gunn Oscillator," IEEE Trans. Microw. Theory Tech. 33, 610-619 (1985).
  22. Golay cells, Inc.Microtech Instruments Eugene www.mtinstruments.com.
  23. J.-Y. Lu, C.-C. Kuo, C.-M. Chiu, H.-W. Chen, Y.-J. Hwang, C.-L. Pan, C.-K. Sun, "THz interferomertric imaging using subwavelength plastic fiber based THz endoscope," Opt. Express 16, 2494-2501 (2008).

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