a laser amplifier arrangement includes an optical pump source and an axially arranged laser oscillator - amplifier configuration pumped by the pump radiation . the laser oscillator - amplifier configuration includes a laser oscillator excitable by a portion of the pump radiation to emit a laser beam , and a laser amplifier that amplifies the laser beam using the pump radiation . the laser oscillator and laser amplifier are arranged in a substantially coaxial or collinear manner relative to a longitudinal axis of the laser oscillator - amplifier configuration . the pump source includes a first beam source for producing a first pump radiation to pump the laser oscillator , a second beam source for producing a second pump radiation for the laser amplifier , and a pump radiation conducting device , by means of which both the first and the second pump radiation can be lead into the laser oscillator - amplifier configuration substantially in the direction of the longitudinal axis for longitudinal pumping .