Producing an optical fiber tap coupler.

摘要

A throughput fibre (4) for an optical fibre tap coupler is provided with an elliptical optical surface (8) by positioning the throughput fibre (4) in a circular groove (20) in a stainless steel jig (10) and polishing or cutting away a portion (4') of the throughput fibre (4), which portion (4') projects beyond flats (24) of the jig (10), the flats (24) being tangential to the groove (20). A tap fibre (6) for the coupler is provided with inclined, end elliptical optical surface (14) by inserting the fibre (6) through a bore (42) in a further stainless steel jig and polishing or cutting away a portion of the tap fibre (6) which projects beyond an inclined surface of the jig. The angle of the inclined surface in relation to the longitudinal axis of the bore determines the area of the end optical surface (14). <IMAGE> <IMAGE>