Abstract

Application and characterization of large-format IR focal-plane arrays as detectors for ultrafast, high-resolution IR spectroscopy are discussed. We also present generation of broadband IR probe–reference pulses by use of collinear non-phase-matched geometry and shot-to-shot dual-track normalization to obtain transient spectra from broadly absorbing hydrogen-bonded systems. As much as 400-cm<sup>-1</sup>-wide coverage with 15-cm<sup>-1</sup> FWHM spectral resolution and ±6.4 × 10<sup>-4</sup>(?OD = 3 × 10<sup>-4</sup>) baseline standard deviation (±1?s) is demonstrated near 2.9 µm.

© 1997 Optical Society of America

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