Patent ID: 6647183
Filing Date: 2003-11-11
Classification: G02B

Abstract:
An optical coupling system for coupling a radiation source emitting radiation as a light beam along an optical axis in an emission direction to a multimode optical waveguide having acceptance angle, the optical coupling system comprising:an optical fiber having a stub, an optical core, an optical cladding, an end-side coupling-out face, an end-side coupling-in face, and a geometrical axis; said stub being a multimode step-index waveguide having an acceptance angle greater than a half-value width of an angular distribution of the radiation emerging from the radiation source, said stub to be disposed downstream of the radiation source with respect to the emission direction; said coupling-in face to be directed toward the radiation source; said coupling-out face to be directed toward and directly connected to the optical waveguide; and said coupling-in face to be associated with the radiation source to couple the light beam into said optical fiber and to incline the light beam, as a coupled-in light beam, relative to said geometrical axis by an angle greater than 2Â° and less than the acceptance angle of the optical waveguide.