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Instruments and standard test procedures for laser beam and optics characterisation

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

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. 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 intended EUREKA project aims at the goal to design, test and finally optimize procedures to optimize procedures to characterise laser beams and optical components for beam guiding. This is to be done in close cooperation with the international standardisation committees (CEN, ISO) in order to guarantee an immediate European wide embodiment of 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 will have to be considered such as the non-paraxial nature of diode laser beams and unstable resonator fields or the particular properties of excimer laser beams. The analysis of commercially available measuring devices will also be included. 2. Beam pointing stability Up to now there is little experience in measuring 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 information on the internal beam structure such as sharpness, symmetry, phase, fluctuation, coherence or polarisation. In this area a lot of fundamental work still has 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 timescales and wave lengths (e.g. damage thresholds of frequency doubled lasers or ns-pulse lasers). These investigations will be done in close collaboration with relevant European companies, which are well established in lasers and laser optics development.
Acronym: 
CHOCLAB
Project ID: 
1 269
Start date: 
01-01-1994
Project Duration: 
84months
Project costs: 
8 570 000.00€
Technological Area: 
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.