High wavenumber Raman signals, including water, from biological tissues can be analyzed using the Raman spectrometer based on NIR excitation (850-880 nm) and InGaAs detector.
Examples include:
O-H group signals from hard dental tissues
O-H group signals from animal skin
Wide field Raman imaging to acquire full scale tooth surface images ~7 mm in diameter.
High-sensitivity nonlinear optical microspectroscopy system integrating coherent anti-Stokes Raman scattering (CARS), second harmonic generation (SHG), and two-photon absorption fluorescence.