CARS Spectrogram of BGA spores

A) Standoff CARS spectrogram of B. atrophaeus spores. Pump, Stokes, and probe pulse energies are 12, 12, and 9 μJ, respectively. The spore sample is placed at 1 m from the laser system and the integration time is 1 s. (B,D) Cross-sections (solid lines) of standoff CARS spectrogram of B. atrophaeus spores and ALS fitting profiles (dashed lines) for probe delays of 0.5 and 1.5 ps. (C,E) Corresponding residuals and reference Raman spectrum of CaDPA (magenta line). Residuals represent broadband CARS fingerprints of B. atrophaeus spores.