Abstract

The implementation of time-resolved step-scan FT-IR spectroscopy with a commercial interferometer is described. With the use of the photoreaction of the biological system bacteriorhodopsin as an example which exhibits infrared spectral changes smaller than 10⁻² absorbance units, the quality of the method is demonstrated. A comparison with conventional flash-photolysis experiments with a monochromatic infrared monitoring beam clearly demonstrates the multiplex advantage. The advantage of covering the total time course of the reaction allows for a variety of data analysis, such as forming difference spectra between intermediates of the reaction and the deduction of time courses of absorbance changes at selected wavenumbers. The mirror stability is better than ±1.5 nm, which is sufficient for the reliable measurement of small absorbance changes.

Time-resolved spectral characterization of ring cavity surface emitting and ridge-type distributed feedback quantum cascade lasers by step-scan FT-IR spectroscopy

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High-information time-resolved step-scan Fourier interferometer

Georges Durry and Guy Guelachvili
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Visible intracavity laser spectroscopy with a step-scan Fourier-transform interferometer

Kimberly Strong, Timothy J. Johnson, and Geoffrey W. Harris
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Infrared intracavity laser absorption spectroscopy with a continuous-scan Fourier-transform interferometer

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Time-resolved Fourier spectroscopy*†

Randall E. Murphy, Floyd H. Cook, and Hajime Sakai
J. Opt. Soc. Am. 65(5) 600-604 (1975)