Frequency comb
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A frequency comb or spectral comb is represented by a spectrum made of discrete, stable and regularly spaced spectral lines. In optics, a frequency comb can be generated by certain laser sources.
Spectrum of the light from the two-laser frequency combs installed on the High Accuracy Radial Velocity Planet Searcher.
Illustration showing how trace gases are detected in the field using a mobile dual-frequency comb laser spectrometer. The spectrometer sits in the center of a circle which is ringed with retroreflecting mirrors. Laser light from the spectrometer (yellow line) passes through a gas cloud, strikes the retroreflector and is returned directly to its point of origin. The data collected are used to identify leaking trace gases (including methane), as well leak locations and their emission rates.
Theodor W. Hänsch
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Theodor Wolfgang Hänsch is a German physicist. He received one-fourth of the 2005 Nobel Prize in Physics for "contributions to the development of laser-based precision spectroscopy, including the opti
Frequency comb
…which was developed around the turn of the 21st century and ultimately led to one half of the Nobel Prize in Physics being shared by John L. Hall and Theodor W. Hänsch in 2005. The frequency domain representation of a perfect frequency comb is like a Dirac comb, a series of delta functions spaced according to…
Hänsch at the 2012 Lindau Nobel Laureate Meeting