Patent ID: 8160413
Filing Date: 2012-04-17
Classification: G02B

Abstract:
1. A fiber optic coupler with variable coupling ratio comprising: an optical fiber set having at least one first optical fiber and at least one second optical fiber respectively with a connection portion; the first optical fiber as well as the second optical fiber is single-core single-mode fiber having a core on an inner layer and a cladding on an outer layer; a fiber loop formed by bending of the connection portion of the first optical fiber and the connection portion of the second optical fiber while the connection portion having a coupling region, an intersection point, an upper taper region and a down taper region on two sides of the coupling region; and a modulation member for positioning two ends of the first optical fiber and the second optical fiber toward the fiber loop, the modulation member comprises a first base and a second base respectively for mounting and positioning the two ends of the first optical fiber and the second optical fiber toward the fiber loop, two ends of the first optical fiber as well as the second optical fiber toward the fiber loop respectively are arranged with two loading parts, so that the two ends of the fiber loop are fixed on the first base and the second base by the loading parts, wherein the two ends of the first optical fiber as well as the second optical fiber toward the fiber loop are positioned on the loading parts by adhesive, which is a ultraviolet (UV) glue.