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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1991),
  • paper QWD46

Coherently enhanced small-signal molecular absorption of ultrashort laser pulses

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Abstract

A series of experiments on vibrationally excited polyatomic molecules revealed an increase in the molecular absorption at line center with decreasing laser-molecule interaction time.1,2 In these experiments, the interaction time was varied by using variable-duration picosecond CO2 laser pulses. We present a calculational approach based on coherent molecular excitation that agrees with experimental data and provides some interesting insight into intramolecular relaxation times in the vibrational quasicontinuum (QC).

© 1991 Optical Society of America

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