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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 3 — Jan. 20, 2006
  • pp: 558–564

Tunable ultrafast infrared∕visible laser to probe vibrational dynamics

Tissa C. Gunaratne, Matthew Milliken, J. Reddy Challa, and M. Cather Simpson  »View Author Affiliations


Applied Optics, Vol. 45, Issue 3, pp. 558-564 (2006)
http://dx.doi.org/10.1364/AO.45.000558


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Abstract

A tunable, ultrafast ( 100   fs 1   ps ) laser system generating mid-IR ( 3 1 0 μ m ) and UV∕visible ( 392 417   nm, 785 835   nm) radiation is described and its output characterized. The system is designed to explore vibrational dynamics in the condensed phase in a direct, two-pulse, time-resolved manner, using Raman spectroscopy as the probe. To produce vibrational resolution, probe pulses are spectrally narrowed by use of a long doubling crystal. Frequency-resolved optical gating is used to evaluate beam characteristics. An effective method for determining the temporal overlap of the pump and probe pulses for a one-color, 400   nm configuration is illustrated. Representative results from studies of heme and para-nitroaniline vibrational dynamics illustrate the effectiveness of the visible pump–visible probe portion of the system in illuminating fast structure and energy dynamics.

© 2006 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(300.0300) Spectroscopy : Spectroscopy
(300.6500) Spectroscopy : Spectroscopy, time-resolved

ToC Category:
Spectroscopy

Citation
Tissa C. Gunaratne, Matthew Milliken, J. Reddy Challa, and M. Cather Simpson, "Tunable ultrafast infrared/visible laser to probe vibrational dynamics," Appl. Opt. 45, 558-564 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-3-558

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