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Instruments and standard test procedures for laser beam and optics characterization.

Development and experimental production of measurement
standards for laser beam/optics characterization. Technology
and instrumentation for on-line and off-line beam and optics
monitoring.

This projects deals with the importance of laser technology in industrial applications as its progress crucially depends on well defined and easy-to-handle measurement procedures, which allow a unique characterisation of laser performance parameters to be made. In order to establish such procedures, it is necessary to proceed on an international level, so that decisions become generally accepted. On this basis the goal of this project is to design, test and ultimately improve procedures to optimize procedures to characterize laser beams and optical components for beam guiding. This will be done in close cooperation with the International Standardisation Committees (CEN, ISO) in order to guarantee immediate European-wide embodiment of the results. The main work items can be summarised by the related normalization projects: 1. Beam width, beam divergence and beam propagation factor Here the goal is to analyse the up to now proposed measurement procedures in order to validate them, find correlations and establish a reference procedure. Various aspects, such as the non-paraxial nature of diode laser beams and unstable resonator fields or the particular properties of excimer laser beams, will have to be considered. The analysis of commercially available measuring devices will also be included. 2. Beam pointing stability Up to now little experience has been acquired in measuring the beam position and beam direction of laser beams. There are some theoretically meaningful approaches, which have to be carefully analysed experimentally. 3. Beam shape For several applications, e.g. in materials processing, it is necessary to acquire information on the internal beam structure such as sharpness, symmetry, phase, fluctuation, coherence or polarization. In this area much fundamental work still remains to be done. 4. Optics characterisation Laser performance in applications also depends crucially on the quality of beam forming optics. The main qualification criteria are absorption, reflection, scattering and laser induced damage. Existing approaches are intended to be refined and transferred to other time scales and wave lengths (e.g. damage thresholds of frequency doubled lasers or ns-pulse lasers). These investigations will be carried out in close collaboration with relevant European companies well established in lasers and laser optics development. Keywords: optical measurement, standardization, laser, diffractive, beam shaping.
Acronym: 
CHOCLAB II
Project ID: 
2 359
Start date: 
01-06-2000
Project Duration: 
60months
Project costs: 
9 920 000.00€
Technological Area: 
Technical Standards
Market Area: 

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.