Optical coupling system

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 coupling-out face, a coupling-in face, and a geometrical axis;
• said fiber 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 fiber 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 fiber and to incline the light beam, as a coupled-in light beam, relative to said geometrical axis by an angle greater than 2° and less than the acceptance angle of the optical waveguide.

An optical coupling system for coupling radiation to an optical waveguide, comprising:

• a radiation source emitting radiation as a light beam along an optical axis in an emission direction;
• a multimode optical waveguide having an acceptance angle;
• 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 said radiation source, said stub disposed downstream of said radiation source with respect to said emission direction;
• said coupling-in face facing said radiation source;
• said coupling-out face facing and directly connecting said multimode optical waveguide;
• and
• said radiation source and said coupling-in face being associated with respect to one another to couple the light beam into said stub and incline the light beam, as a coupled-in light beam, relative to said geometrical axis by an angle greater than 2° and less than said acceptance angle of said multimode optical waveguide.

In 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, an 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 2° and less than the acceptance angle of the optical waveguide.