The invention provides a high-power ASE
light source with multi-section
cascade 1064nm wave bands. The ASE
light source comprises a source beam combiner, an
optical isolator, an active doubly coated optical fibre, a
cladding mode filter, a functional multi-mode optical fibre, a
semiconductor pumping
laser and the like. The ASE
light source is characterized by comprising an n-section
cascade structure, wherein the output power of the
semiconductor pumping
laser is divided into n parts according to certain proportion for respectively pumping N YDF (
Ytterbium-doped Fibre) sections, so that pumping power at each level is rationally distributed and sufficiently utilized; the active beam combiner is adopted to simply the process, so that a complicated
welding and re-
coating process is avoided in the use of the traditional beam combiner; the functional multi-mode optical fibre is adopted to restrain the
light reflection on the end surface of the optical fibre and to reduce the
light damage effects on the end surface of the optical fibre. Besides, the adopted
cladding mode fibre can effectively filter the pump light of a residual cladding, and prevent the residual cladding from breaking the effects. In a word, the high-power ASE light source can effectively restrain the generation of the
laser, and can ensure the high-power ASE light output.