Title :
Graded-index linear tapers
Author :
Safaai-Jazi, A. ; Mortazavi, A.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
A parabolic graded-index linear taper is proposed and analyzed using the geometrical optics approach. Ray trajectories are calculated as a function of taper length and angle. Both leaky and bound rays are examined. Applications of the proposed taper are addressed with particular emphasis on coupling of light sources to optical fibers. As an example, improvement in power coupling efficiency of surface emitting light source to multimode fiber is studied. This improvement is due to the gradual concentration of power from a larger area to a smaller one. Simulation results for ray trajectories illustrating the gradual focusing of light are presented
Keywords :
gradient index optics; light emitting diodes; optical couplers; optical fibre theory; optical fibres; ray tracing; bound rays; geometrical optics; leaky rays; light focusing; light sources/optical fibres coupling; multimode fiber; parabolic graded-index linear taper; power coupling efficiency; ray trajectories; surface emitting light source; taper angle; taper length; Costs; Coupling circuits; Electromagnetic waveguides; Geometrical optics; Lenses; Light sources; Optical coupling; Optical fiber communication; Optical fibers; Optical waveguides;
Conference_Titel :
System Theory, 1994., Proceedings of the 26th Southeastern Symposium on
Conference_Location :
Athens, OH
Print_ISBN :
0-8186-5320-5
DOI :
10.1109/SSST.1994.287827
