Multimode optical fiber coupler and method of manufacture thereof.

摘要

A multimode coupler in accordance with the invention comprises two multimode fibers fused together. A first taper leads to a unitary region of predetermined length. A second taper leads to a minimum diameter waist region at the center of the coupler. The method of manufacture involves heating the fibers and a ceramic member with a laser and scanning the fiber pair thereby to cause fusion thereof. Axial tension is applied selectively to result in the above-discussed construction.