Fig. 3.

(a) DS-CARS spectrum (black) with three peaks is obtained from the difference of the two simulated CARS signals by soliton 1 and 2. (b) and (c) Simulated effect of peak location of DS-CARS (b) and spectral separation of the dual-soliton (c) on the linear correlation between Peak intensity and concentration of dilute analytes. (d) The correlation coefficient R² against the ratio of resonant and nonresonant contribution. The marker (green hex star) represents a nonresonant contribution about 100 times weaker than the resonant contribution. F = the F-test value, P = statistical significance.