Ultrasensitive coherent Raman technique with picosecond lasers

Schauer, M. W.; Pellin, M. J.; Biwer, B. M.; Gruen, D. M.
February 1987
Applied Physics Letters;2/16/1987, Vol. 50 Issue 7, p371
Academic Journal
The use of picosecond, Q-switched lasers and advanced polarization schemes has led to the development of a coherent Raman technique with the sensitivity of coherent anti-Stokes Raman spectroscopy experiments but without the troublesome phase-matching requirements. Experiments in dilute solutions of benzene indicate a limit of sensitivity for the current apparatus of 2.5×10-4 M in two minutes of signal averaging over 150 cm-1. Possible applications to the in situ study of passive films and thin films on transparent media are discussed.


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