Title :
Analysis of bent step-index optical fibres by the beam propagation method
Author :
Yamauchi, J. ; Ikegaya, M. ; Nakano, H.
Author_Institution :
Coll. of Eng., Hosei Univ., Tokyo, Japan
fDate :
6/1/1992 12:00:00 AM
Abstract :
The field distribution and loss in a single-mode bent optical fibre are analysed by the beam propagation method. The steady-state field at large propagation distances is compared with the field obtained by a perturbation theory. Transition loss and pure bend loss are also compared with other theoretical results. The reduction in bend loss is demonstrated by introducing an offset core and a trench section which is placed at the outer side of the bend. Differential-power-loss calculation reveals how the offset core and the trench reduce the bend loss
Keywords :
bending; optical fibres; optical losses; optical waveguide theory; perturbation theory; refractive index; beam propagation method; bent step-index optical fibres; differential-power-loss calculations; fibre optical losses; field distribution; large propagation distances; offset core; perturbation theory; pure bend loss; single-mode; transition loss; trench section;
Journal_Title :
Optoelectronics, IEE Proceedings J
