Light transmission of bent multimode optical fibers

An analysis is made of the dependence of the transmission of light on the bending radius of a waveguide from the point of view of mode–ray equivalence. A study is made of the influence of directional properties of a radiation source exciting a waveguide and of the parameters of the waveguide itself on the sensitivity to bending. The dependences of light transmission on the bending radius are derived for various waveguides and angular distributions of the radiation emitted by a source.