JET-P(93)50
Depolarization of Far Infrared Laser Beams in Inconel and Alumina Waveguides
Far infrared interferometric systems on large tokamaks like JET require beam propagation over long distances (~80m on JET) with minimum loss. It was shown in [1] that at 339µm wavelength of the HCN laser oversize waveguides of the dialectic type (glass) are more efficient than metal (copper) waveguides.