ULTRA: A unique instrument for time-resolved spectroscopy

Gregory M. Greetham, Pierre Burgos, Cao Qian, Ian P. Clark, Peter S. Codd, Richard C. Farrow, Michael W. George, Moschos Kogimtzis, Pavel Matousek, Anthony W. Parker, Mark R. Pollard, David A. Robinson, Xin Zhi-Jun, Michael Towrie

Research output: Journal PublicationArticlepeer-review

165 Citations (Scopus)


We report the development of a high-sensitivity time-resolved infrared and Raman spectrometer with exceptional experimental flexibility based on a 10-kHz synchronized dual-arm femtosecond and picosecond laser system. Ultrafast high-average-power titanium sapphire lasers and optical parametric amplifiers provide wavelength tuning from the ultraviolet (UV) to the mid-infrared region. Customized silicon, indium gallium arsenide, and mercury cadmium telluride linear array detectors are provided to monitor the probe laser intensity in the UV to mid-infrared wavelength range capable of measuring changes in sample absorbance of AOD ∼ 10-5 in 1 second. The system performance is demonstrated for the time-resolved infrared, two-dimensional (2D) infrared, and femtosecond stimulated Raman spectroscopy techniques with organometallic intermediates, organic excited states, and the dynamics of the tertiary structure of DNA.

Original languageEnglish
Pages (from-to)1311-1319
Number of pages9
JournalApplied Spectroscopy
Issue number12
Publication statusPublished - Dec 2010


  • 2DIK
  • Femtosecond stimulated raman spectroscopy
  • Index headings
  • Instrumentation
  • Raman spectroscopy
  • Spectrometer
  • Time-resolved spectroscopy
  • Two-dimensional infrared spectroscopy

ASJC Scopus subject areas

  • Instrumentation
  • Spectroscopy


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