Patent ID: 8730469

Claim:
A method for detecting vibrational structure of a molecule, said method comprising: generating White Light Continuum (WL) probe and picosecond pump, said picosecond pump is generated from a femtosecond pulsed source which is passed through a spectral filter to obtain a picosecond pulse of a predetermined range, the WL probe being generated by filtering the WL continuum using a short wave pass filter, and the WL probe covering both the Stokes and anti-Stokes Raman vibrational frequencies; focusing the WL probe and the picosecond pump onto a sample temporally and spatially; collecting a WL signal generated with the picosecond pump and WL signal generated without the picosecond pump after focusing the WL probe and the picosecond pump onto a sample; and obtaining a WL spectrum from the collected WL signal generated with and without the picosecond pump, said WL spectrum covering the spectral region ranging from Stokes to anti-Stokes Raman vibrational frequencies to detect the vibrational structure of the molecule; wherein intensity of loss signal on anti-Stokes side is more than the intensity of gain signal on Stokes side of the spectral region.