Fig. 1.

Multiplex SRS process and the SRS-FC system. (A) Multiplex stimulated Raman scattering process. A narrow-band Stokes pulse ${\omega }_s$ and a broadband pump pulse ${\omega }_p$ interact with the sample, generating a stimulated Raman gain $\text{Δ}{I}_s={\text{Σ}}_i\text{Δ}I{s}_i$ and stimulated Raman loss $\text{Δ}{I}_{pi}$ contributed by different Raman transitions ${\mathbf{\text{Ω}}}_i$. (B) Experimental setup of multiplex SRS-FC. HWP: half-wave plate; L: lens; AOM: acousto-optic modulator; GS: galvo scanner; DM: dichroic mirror; PBS: polarization beam splitter; CL: cylindrical lens; SP: short-pass filter. The galvo scanner performed one-dimensional laser scanning when the flow performance was examined. The laser focus was not scanned when the high-throughput SRS-FC data were acquired.