J. A. Arnaud

Bell System Technical Journal, The  (Volume:53 ,  Issue: 8 ), pages 1643 – 1656, Oct. 1974

ABSTRACT

The theory of propagation in a new single-material, single-mode, optical fiber is given. The modes are of the whispering-gallery type, with the propagation taking place along helicoidal paths close to the boundary of a cylindrical dielectric rod. The beams are confined in the azimuthal direction in helicoidal ridges. It is shown that single-mode, low-loss operation is possible if the helix period is of the order of the rod cross-section area divided by the wavelength and the ridge area is of the order of 1 percent of the rod cross-section area for two channels. The rod is supported by helicoidal wings that play a role in the mode-selection mechanism.

LIEN VERS  L’ARTICLE : THEORY OF THE SINGLE-MATERIAL, HELICOIDAL FIBER