Fig. 1.

Inset: raw typical single 20 ms frame of CCD output using 200 mW of 830 nm excitation on a human fingertip. Bottom: same frame showing sections of emission integrated to estimate inelastic emission (IE, $\approx 500$ to $1750{\mathrm{cm}}^{-1}$) and elastic emission (EE, $-30$ to $+10{\mathrm{cm}}^{-1}$).