Application Of High-Speed Photography To Time-Resolved Wavefront Measurement

D. R. Neal; W. C. Sweatt; W. J. Alford; D. A. McArthur; G. N. Hays

doi:10.1117/12.942208

4 February 1988 Application Of High-Speed Photography To Time-Resolved Wavefront Measurement

D. R. Neal, W. C. Sweatt, W. J. Alford, D. A. McArthur, G. N. Hays

Proceedings Volume 0832, High Speed Photography, Videography, and Photonics V; (1988) https://doi.org/10.1117/12.942208
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

For long-pulse (150 microseconds), side-pumped lasers, such as dye or reactor-pumped lasers, a significant transverse index gradient can develop. In order to design an appropriate laser resonator for efficient power extraction, a detailed space- and time-resolved determination of the index perturbation is required. We have applied high-speed photography to the measurement of wavefront errors in a pulsed laser gain region using a fast framing camera. We utilized both a derivative of a Hartmann test technique and a shearing interferometer, with good agreement between the two. The measured wavefronts have a predominantly parabolic index shape except near the walls, with a roughly linear time dependence during the pumping pulse.

Citation Download Citation

D. R. Neal, W. C. Sweatt, W. J. Alford, D. A. McArthur, and G. N. Hays "Application Of High-Speed Photography To Time-Resolved Wavefront Measurement", Proc. SPIE 0832, High Speed Photography, Videography, and Photonics V, (4 February 1988); https://doi.org/10.1117/12.942208

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