Adaptive dual-comb spectroscopy in the green region
  Dual-comb spectroscopy is extended to the visible spectral range with a set-up based on two frequency-doubled femtosecond ytterbium-doped fiber lasers. The dense rovibronic spectrum of iodine around 19240 cm-1 is recorded within 12 ms at Doppler-limited resolution with a simple scheme that only uses free-running femtosecond lasers. 
Takuro Ideguchi, Antonin Poisson, Guy Guelachvili, Theodor W.   H\"ansch, Nathalie Picqu\'e
physics.optics