Title :
Lossless dielectric tapers with three-dimensional geometry
Author :
Sakai, Jun-ichi ; Marcatili, Enrique A J
Author_Institution :
Res. Inst. for Adv. Sci. & Technol., Tokyo Univ., Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
General properties of two-dimensional tapers for the cylindrical coordinate systems are described. A criterion to determine the index distribution of lossless tapers is given in terms of the phase shift. The design method of lossless tapers with three dimensional geometry is presented. Design equations of tapers for spherical, conical and ellipsoidal coordinate systems are described, and some specific design examples are presented. Tapers for a complicated refractive index can be solved by a numerical method based on the design equations. It is shown that equations for the ellipsoidal coordinates can be reduced to those for coordinate systems with high symmetry
Keywords :
optical design techniques; optical fibres; 2D lossless dielectric tapers; 3D taper design geometry; conical co-ordinates; cylindrical coordinate systems; ellipsoidal coordinate systems; index distribution; numerical method; phase shift; refractive index; spherical co-ordinates; taper design equations; Dielectric losses; Equations; Fiber lasers; Geometry; Laser modes; Optical losses; Optical refraction; Optical scattering; Optical variables control; Waveguide lasers;
Journal_Title :
Lightwave Technology, Journal of
