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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1984),
  • paper WII10

Investigation of Nitrobenzene by Coherent Anti-Stokes Kaman Spectroscopy

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Abstract

Nitrobenzene is a molecule of polar structure. The strong interaction between polar groups of the molecules introduces considerable effects on molecular vibrations. Coherent anti-Stokes Raman spectroscopy (CARS) was used to study the frequency shifts of vibrational modes of nitrobenzene in liquid-vapor phase change. An experimental setup for simultaneous recording of the CARS spectra in the different states by scanning a single dye laser, which provides the Stokes beams of the liquid and the vapor measuring parts, was established. The second harmonic of a Nd:YAG laser was used as the CARS pump beam and the pumping source of the dye laser. As the intense power (>10 mJ) of the pump beam induced certain change in nitrobenzene vapor and so disturbed the measurement of the spectra, the laser beam must be properly attenuated in our experiments.

© 1984 Optical Society of America

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