Fig. 2.

Simulated average A-scan $⟨A(z)⟩$ according to Eq. (2) (black curve) and the contribution of the individual terms, including single exponential decay (red dash), CPSF $t(z)$ (blue dash), and sensitivity roll-off $h(z)$ (green dash). Parameters for the simulation are: $z_0=0.25\mathrm{mm}$; ${\mu }_s=5{\mathrm{mm}}^{-1}$; refractive index $n=1.4$; noise floor at $-80\mathrm{dB}$; Rayleigh length $z_R=100\mu \mathrm{m}$; focus location $z_f=1\mathrm{mm}$; center wavelength and spectral sampling increment are $\lambda =1300\mathrm{nm}$ and $\mathrm{\Delta }\lambda =0.1\mathrm{nm}$, respectively, giving a maximum imaging depth of $z_D=3\mathrm{mm}$; $s=2$.