Title :
Analytical solution of the field in a fibre up-taper with a parabolic index profile
Author :
Bolle, A. ; Lundgren, L.
Author_Institution :
Dept. of Appl. Electron. Phys., Chalmers Univ. of Technol., Goteborg, Sweden
fDate :
10/1/1990 12:00:00 AM
Abstract :
An analytical solution of the field in a fibre up-taper with a parabolic index profile is obtained by solving the scalar wave equation. The field is expressed in generalised Laguerre-Gaussian polynomials. With this description, the evolution of the spot size and the wavefront curvature are easily seen. The presence of spot size oscillations along a taper is predicted in the case of a mismatch between the exciting beam at the taper entrance and the fundamental mode
Keywords :
optical couplers; optical fibres; polynomials; refractive index; Laguerre-Gaussian polynomials; analytical solution; exciting beam; fibre coupler applications; fibre up-taper; fibre up-taper field; fundamental mode; optical fibres; parabolic index profile; scalar wave equation; spot size; spot size oscillations; taper entrance; wavefront curvature;
Journal_Title :
Optoelectronics, IEE Proceedings J
