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Nature Photonics 2, 712–713 (1 December 2008) | doi:10.1038/nphoton.2008.240

Frequency combs: Combs for dark energy

Thomas R. Schibli

Laser frequency combs can be used to calibrate astronomical spectrometers to a level far beyond that achievable in current systems. This is the finding of researchers in Germany and Australia reporting in Science.