Patent ID: 8761557

Claim:
A compact optical fiber amplifier comprising: an optical module including a plurality of optical elements provided therein, an input port and an output port; and a plurality of optical fibers introduced into and extracted from the optical module through the input port and the output port of the optical module, respectively, and forming at least one loop with a predetermined radius of curvature at an outside of the optical module together with the optical module, wherein the plurality of optical fibers comprises a plurality of connection optical fibers for connecting the optical elements and an optical amplification fiber for amplifying an optical signal, wherein one end of at least one of the plurality of connection optical fibers is coupled to an output end of one of the plurality of optical elements and another end thereof is extracted to the outside of the optical module through the output port, forming the at least one loop with the predetermined radius of curvature at the outside of the optical module, introduced into the optical module through the input port, and then coupled to an input end of another of the plurality of optical elements, and wherein one end of the optical amplification fiber is coupled to an output end of one of the plurality of optical elements and another end thereof is extracted to the outside of the optical module through the output port, forming at least two loops with the predetermined radius of curvature at the outside of the optical module by passing through the optical module at least twice and coupled to an input end of another of the plurality of optical elements, and therefore the at least one loop of the plurality of optical fibers comprises the at least two loops of the optical amplification fiber.