Influence of curvature on the losses of doubly clad fibers

Appl Opt. 1982 Dec 1;21(23):4208-13. doi: 10.1364/AO.21.004208.

Abstract

The loss increase of the HE(11) mode of a doubly clad (depressed-index) fiber due to constant curvature is considered. The calculations presented in this paper are based on a simplified theory. We find that for typical fibers the leakage loss of the HE(11) mode begins to increase significantly when the radius of curvature of the fiber axis reaches the 1-10-cm range.