Patent ID: 8358461

Claim:
A wavelength-tunable light source having an output source, which is capable of generating electromagnetic radiation (R); a wavelength-selective first filter element, which is situated downstream from the output source; a first amplifier medium, which is situated downstream from the first filter element and is capable of at least partial amplification of the radiation (R); at least one wavelength-selective second filter element, which is situated downstream from the first amplifier medium, the second filter element having an optical spacing (L) to the first filter element; and a control unit, via which the first and the at least one second filter elements are tunable, so that first and second filter elements are transparent to a partial radiation (P) of the radiation (R) in a time delay (T) to one another, wherein the delay (T) is equal to the quotient of the optical spacing (L) and the speed of light in vacuum (c).