Fig. 2: Implementation of MMI-mediated dual-wavelength mode locking at GHz.
From: Practical GHz single-cavity all-fiber dual-comb laser for high-speed spectroscopy
a Calculated wavelength spacing \(\Delta \lambda\) of the MMI-mediated spectral filtering effect. Inset shows the laser cavity that has an equivalent SMF-FMGF-SMF configuration. b Measured intracavity transmission curve. c Simulated optical spectra (top) and temporal evolutions (bottom) for synchronous (left) and asynchronous (right) mode-locked pulses. d Experimental optical spectrum (top) and temporal evolution (bottom) of the dual-wavelength MLFL
