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Optics Letters

Optics Letters


  • Vol. 19, Iss. 2 — Jan. 15, 1994
  • pp: 129–131

Dual-beam subpicosecond broadband infrared spectrometer

T. P. Dougherty and E. J. Heilweil  »View Author Affiliations

Optics Letters, Vol. 19, Issue 2, pp. 129-131 (1994)

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A method for obtaining broadband multichannel IR spectra with subpicosecond time resolution is described. Spectrally broad IR pulses, produced by difference-frequency mixing of two visible pulses in LiIO3, are split to make signal and reference pulses. After sample absorption, the IR pulses are upconverted by a second LiIO3 crystal to produce visible pulses that are dispersed on a CCD detector to yield transient spectra with 100-cm−1 bandwidth and 4-cm−1 resolution. With this dual-beam technique, spectra with sensitivities of 0.001 ΔOD are obtained.

© 1994 Optical Society of America

Original Manuscript: September 1, 1993
Published: January 15, 1994

T. P. Dougherty and E. J. Heilweil, "Dual-beam subpicosecond broadband infrared spectrometer," Opt. Lett. 19, 129-131 (1994)

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