The present invention relates to a conical wedge-shaped lensed fiber and
the method of making the same. The method comprises: (a) providing an
optical fiber having a central axis and an end; (b) machining the end of
the optical fiber to form a flat end face; (c) machining the end of the
optical fiber to form a conical region; (d) machining one side of the
conical region to form a flat first surface; (e) machining another side
of the conical region to form a flat third surface, wherein the first
surface and the third surface intersect at a intersecting line that is
perpendicular to the central axis; and (f) fusing the intersecting line
to form a lens. The method has simplified fabricating processes and need
not to set up any particular angle of rotation of the fiber. Therefore,
the fabricating time and cost are reduced, and the coupling efficiency of
the lensed fiber is up to 90%.