Patent ID: 9130340
Filing Date: 2015-09-08
Classification: G02B,H01S

Abstract:
1. An optical amplifier comprising: a single mode input fiber section for delivering an optical input signal; a length of a highly-doped glass based optical gain fiber optically coupled with the input fiber section, the optical gain fiber being doped with any combination of Er3+, Yb3+, Tm3+, Pr3+, Ho3+, and Nd3+ ions, with a combined doping concentration above 1% by weight, the optical gain fiber comprising a single mode index guiding gain fiber; a side pumping mechanism having pre-made pump light delivery fiber pigtails coupled to the highly-doped glass based optical gain fiber; an output port in optical communication with the highly-doped glass optical gain fiber, wherein the output port is less than about twenty centimeters long, wherein the output port comprises a pre-made fiber-pigtailed collimator, a pre-made fiber-pigtailed beam focuser, or a pre-made fiber-pigtailed optical connector, and the fiber pigtail of the fiber-pigtailed collimator, the fiber pigtail of the fiber-pigtailed beam focuser, or the fiber pigtail of the fiber-pigtailed optical connector, as the case may be, is in optical contact with an output end of the highly-doped glass based optical gain fiber; and wherein the highly-doped glass based optical gain fiber, pre-made fiber pigtails of the fiber-pigtailed collimator, fiber-pigtailed focuser or fiber-pigtailed connector, and the pre-made pump light delivery fiber pigtails are co-packaged together in a single bundle.