Title :
Efficient power coupling using taper-ended multimode optical fibres
Author :
Ozeki, Takeshi ; Kawasaki, B.S.
Author_Institution :
Communications Research Centre, Department of Communications, Ottawa, Canada
Abstract :
Highly efficient power coupling of up to 97% between a d.h. laser and a multimode step-index fibre is demonstrated by employing a tapered fibre launcher. Also, it is shown theoretically that a tapered end increases the effective numerical aperture of a fibre. For a Lambertian emitter, the use of a taper launcher permits the maximum coupling efficiency allowed by the Liouville theorem.
Keywords :
optical couplers; optical fibres; semiconductor junction lasers; 97% coupling; Lambertian emitter; Liouville theorem; double heterostructure laser; effective numerical aperture; efficient power coupling; experimental results; maximum coupling efficiency; optical fibre couplers; semiconductor laser coupling to fibre; step index fibre; taper ended multimode optical fibres; tapered fibre launcher;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19760464
