Characterization of bending loss in hollow flexible terahertz waveguides.

نویسندگان

  • Pallavi Doradla
  • Cecil S Joseph
  • Jayant Kumar
  • Robert H Giles
چکیده

Attenuation characteristics of hollow, flexible, metal and metal/dielectric coated polycarbonate waveguides were investigated using an optically pumped far infrared (FIR) laser at 215 µm. The bending loss of silver coated polycarbonate waveguides were measured as a function of various bending angles, bending radii, and bore diameters. Minimal propagation losses of 1.77, 0.96 dB/m were achieved by coupling the lowest loss TE11 mode into the silver or gold coated waveguide, and HE11 mode into the silver/polystyrene coated waveguides respectively. The maximal bending loss was found to be less than 1 dB/m for waveguides of 2 to 4.1 mm bore diameters, with a 6.4 cm bend radius, and up to 150° bending angle. The investigation shows the preservation of single laser mode in smaller bore waveguides even at greater bending angles.

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عنوان ژورنال:
  • Optics express

دوره 20 17  شماره 

صفحات  -

تاریخ انتشار 2012