Patent ID: 6470113
Filing Date: 2002-10-22
Classification: H01S

Abstract:
An apparatus, comprising:a seed-beam light source outputting a seed-beam of a predetermined band of wavelength; a first optical coupler guiding a first pumping light; a rare earth ion-doped optical fiber having a front side and a rear side, said first optical coupler guiding said first pumping light to be incident to said front side of said rare earth ion-doped optical fiber; a first pumping light source supplying said first pumping light to said first optical coupler; a second optical coupler guiding second pumping light to be incident to said rear side of said rare earth ion-doped optical fiber; a second pumping light source supplying said second pumping light to said second optical coupler; a third optical coupler being positioned between said seed-beam light source and said second optical coupler, said third optical coupler receiving said seed-beam outputted from said seed-beam light source and guiding said seed-beam to be incident to said rear side of said optical fiber; and an output terminal radiating light outputted through said rear side of said rare earth ion-doped optical fiber.