2019/09/20 by Guay, Philippe, Tourigny-Plante, Alex, Hébert, Nicolas Bourbeau +4
#FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Optics (physics.optics)
paper · doi:10.48550/arxiv.1909.09715
The phase information provided by the beat note between frequency combs and two continuous-wave lasers is used to extrapolate the phase evolution of comb modes found in a spectral region obtained via nonlinear broadening. This thereafter enables using interferogram self-correction to fully retrieve the coherence of a dual-comb beat note between two independent fiber lasers. This approach allows to forego the f - 2f self-referencing of both combs, which is a significant simplification. Broadband near-infrared methane spectroscopy has been conducted as a demonstration of the simplified system's preserved performance.