25 July 2016 Single-mode porous fiber for low-loss polarization maintaining terahertz transmission
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Abstract
We report on a polymer-based porous-core photonic crystal fiber for simultaneous high-birefringent and low-loss propagation of narrowband terahertz (THz) electromagnetic waves. The high birefringence is induced by using rotated elliptical air holes inside the porous-core. The fiber is numerically analyzed with an efficient finite-element method. The simulation results exhibit an extremely high birefringence of ∼0.042 and a very low effective material loss of ∼0.07  cm−1 at an operating frequency of 1 THz. Moreover, we have found an optimal rotation angle (θ)=n30  deg (n is an odd integer). Other modal features of the fiber, such as confinement loss, power fraction, effective area, bending loss, and dispersion, also have been analyzed. We anticipate that the proposed fiber would be suitable in polarization maintaining THz wave guidance applications.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Sohel Rana, Md. Saiful Islam, Mohammad Faisal, Krishna Chandra Roy, Raonaqul Islam, Shubi F. Kaijage, "Single-mode porous fiber for low-loss polarization maintaining terahertz transmission," Optical Engineering 55(7), 076114 (25 July 2016). https://doi.org/10.1117/1.OE.55.7.076114 . Submission:
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