Laser Beam Measurement: Section Introduction

Authored by: Julian Jones

Handbook of Laser Technology and Applications

Print publication date:  June  2021
Online publication date:  June  2021

Print ISBN: 9781138032613
eBook ISBN: 9781315389561
Adobe ISBN:

10.1201/b21828-31

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Abstract

To characterize a laser beam requires complete knowledge of its mutual coherence function—the power (or energy) distribution and the relative phase distribution over a single transverse plane—achieved by complex measurement and subsequent analysis. In Chapter 32, Brooke Ward describes a useful approximation to the ideal, based on measuring the beam diameter and divergence at a set of transverse planes along the axis of the laser beam, considering how the diameter is to be defined (using a second-moment technique) for different types of beams; how the measurements are to be made, using sensor arrays or scanning slits.

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