Method of producing a coupling element for an optical transmission fiber

摘要

Method of producing a coupling element for coupling a laser radiation source to a monomode optical transmission fiber. The end of the fiber is monotonically flattened at a temperature at which the fiber's core has a viscosity of between 107 to 108.5 poises. The fiber has a cladding glass chosen to have a viscosity of between 1010-1011 poises at the flattening temperature. This causes the core glass to emerge in the form of a semi-ellipsoidal lens, when the fiber is flattened.