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Updated: Jun 14, 2026

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Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Self-calibrating technique for beam divergence measurements of cw and pulsed lasers
Applied Optics
|March 24, 2010
Abstract:
A convenient method to measure beam divergence of laser beams is described. The apparatus is compact and accurate due to the use of a telescope to focus the beam. Incorporation of a Fabry-Perot etalon permits focusing and in situ calibration. Measurement of single-pulse beam divergence is performed with a CCTV system which includes a video tape recorder.

