An optical system adapted to amplify an input signal includes an optical pump supporting the input signal and an optical pump beam. The optical pump includes an input port, a first active medium coupled to the input port, and a pump output coupled to the first active medium. The optical amplifier includes...http://www.google.es/patents/US7738166?utm_source=gb-gplus-sharePatente US7738166 - Fiber amplifier with integrated fiber laser pump
