Optical fibres wavelength multiplexer-demultiplexer

摘要

The fibre optic line construction has an annular ring placed between an isolating ring section and the outer sleeve. The annular ring has an optical index (n3) above that of the outer sleeve and the inner ring section. The central core of the fibre optic line has a triangular variation in optical index (n1) across its diameter peaking above the intermediate ring optical index section value.