Optical amplifier arrangement of optical parametric amplifiers and white light generations and a harmonic generation, in particular frequency doubling, for generating a broad visible to infrared, in any case near-infrared, spectrum of coherent ultra-short light pulses, in particular with a pump laser, comprising: - a first white light generation and a first optical parametric amplifier for generating a first signal light and a first idler light and also a second white light generation and a second optical parametric amplifier for generating a second signal light and a second idler light and the harmonic generation, which are optically coupled in such a way that - during operation the first optical parametric amplifier is pumped by the first white light generation and the second optical parametric amplifier is pumped by the second white light generation, and wherein during operation - the first white light generation and the first optical parametric amplifier and the harmonic generation are pumped by a fundamental of a laser, wherein a seeding of the first optical parametric amplifier takes place by means of the first white light generation, and - the second white light generation takes place by means of the first optical parametric amplifier and the second optical parametric amplifier is pumped by a second or higher harmonic of the fundamental of the pump laser, wherein a seeding of the second optical parametric amplifier takes place by means of the second white light generation, characterized in that - during operation the fundamental lies in a wavelength range above 950 nm, and - the second signal light and the second idler light of the second optical parametric amplifier together cover a tunability range of wavelengths between 500 nm and 5 μm, in particular between 550 nm and 3 μm, wherein - tuning can be carried out continuously between wavelengths in the tunability range, namely tuning can be carried out continuously through a degeneration range of the second optical parametric amplifier at the fundamental of the pump laser. - a first white light generation and a first optical parametric amplifier for generating a first signal light and a first idler light and also a second white light generation and a second optical parametric amplifier for generating a second signal light and a second idler light and the harmonic generation, which are optically coupled in such a way that - during operation the first optical parametric amplifier is pumped by the first white light generation and the second optical parametric amplifier is pumped by the second white light generation, and wherein during operation - the first white light generation and the first optical parametric amplifier and the harmonic generation are pumped by a fundamental of a laser, wherein a seeding of the first optical parametric amplifier takes place by means of the first white light generation, and - the second white light generation takes place by means of the first optical parametric amplifier and the second optical parametric amplifier is pumped by a second or higher harmonic of the fundamental of the pump laser, wherein a seeding of the second optical parametric amplifier takes place by means of the second white light generation, - during operation the fundamental lies in a wavelength range above 950 nm, and - the second signal light and the second idler light of the second optical parametric amplifier together cover a tunability range of wavelengths between 500 nm and 5 μm, in particular between 550 nm and 3 μm, wherein - tuning can be carried out continuously between wavelengths in the tunability range, namely tuning can be carried out continuously through a degeneration range of the second optical parametric amplifier at the fundamental of the pump laser.