Table 1.

Principal technical specification of the Raman spectroscopy system.

Excitation wavelength (nm)	Spectral range (${\mathrm{cm}}^{-1}$)	Interrogated area diameter (mm)	Delivered power (mW)	Spectral resolution (nm)
680	2500 to 4000	0.5	0 to 150	0.1 to 0.2
785	500 to 2000	0.5	0 to 150	0.1 to 0.2