&lt;title&gt;Characterization of hard-edge diffracted beams&lt;/title&gt;

Maestle, Ruediger; Giesen, Adolf

doi:10.1117/12.259889

Cited by 5 publications

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“…To answer these questions experimental and theoretical investigations have been done ( [18], [19]). Figure 16 shows the optical setup used for the measurements and the calculations.…”

Section: Window Functionsmentioning

confidence: 99%

Instruments and standard measurement procedures for laser beam characterization

Maestle

Schmitz

Varnik

et al. 1998

ROMOPTO '97: Fifth Conference on Optics

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The EUREKA-project CHOCLAB (Characterization of Qptica! Components and Laser eams), which was initiated in 1995, aims to investigate and develop instruments and standard measurement procedures for laser beam and laser optics characterization. From the start of the project, one of the main work items in the field of laser beam characterization has been the determination of the beam propagation parameters (beam width, divergence angle and beam propagation factor). The most common measurement devices for these purposes are 2d-matrix-cameras (i. e. CCD-cameras), id or 2d scanning devices (i. e. scanning pinholes and/or moving knife-edges) -both of them requiring further evaluation of the measured power density distribution to obtain laser beam parameters -and variable transmission/reflectivity optical elements, which allow the direct measurement of beam properties. The advantages and drawbacks of the different types of measurement devices, as well as measures to reduce systematical and statistical errors will be discussed.The instruments and proposed standard measurement procedures are tested by ,,Round Robin" experiments: different laboratories characterize the same laser beam source according to the standards. In 1996 and 1997 four different ,,Round Robin" experiments on laser beam characterization were performed within the CHOCLAB project. The main goal of these ,,Round Robin" experiments was to test the applicability of the proposed standard measurement procedures to different important types of industrial laser devices (in particular high power C02-lasers and pulsed Nd:YAG-lasers). The results of these experiments as well as the current status of CHOCLAB and of the draft international standards concerning laser beam characterization will be briefly reviewed.

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“…To answer these questions experimental and theoretical investigations have been done ( [18], [19]). Figure 16 shows the optical setup used for the measurements and the calculations.…”

Section: Window Functionsmentioning

confidence: 99%