Rapidly scanning, high resolution Yb fiber based frequency comb-Fourier transform spectrometer

Frequency comb technology has revolutionized many aspects of spectroscopic measurements, most recently exemplified by the introduction of multi-heterodyne spectroscopy, which is now replacing traditional mechanically scanning Fourier transform spectrographs, providing orders of magnitude improvements in scan rate and resolution. However, a power scalable and compact, optically integratable platform for multi- heterodyne spectroscopy is still missing. This paper demonstrates a Fourier transform spectroscopy (FTS) based on a pair of low noise, GHz repetition rate, Yb fiber frequency combs. A proof of concept all-fiber system and further contract all amplification and spectral broadening stages into a single all-fiber propagation path, are presented.