A glass optical reflective tap is described that optically connects two
optical fibers and may tap a portion of the light that is being
communicated between the optical fibers. In one embodiment of the
invention, the optical filter includes two D-lenses that operate as
focusing or collimator lenses. The first D-lens focuses an optical signal
onto a tap filter that allows a majority of the light within an optical
signal to pass and also reflects a small portion of optical signal light
to a reflective port. The second D-lens focuses the passed light into a
transmission port of an optical fiber.