OPTICAL DEMULTIPLEXER AND METHOD OF ASSEMBLING OPTICAL DEMULTIPLEXER IN OPTICAL AXIS ALIGNMENT

摘要

An optical demultiplexer has a plurality of transparent or translucent tubescombined in axially slidably interfitting relationship to each other. An inputoptical fiber,a collimator lens, and a diffraction grating are mounted on the tubes,preferably on endfaces of the tubes. The optical demultiplexer can be assembled for centeredalignment byinstalling the input optical fiber, the collimator lens, and the diffractiongrating on thetubes, and sliding the tubes relatively to each other according to passivealignment.