23 March 2005 Flat-top shaped laser beams: reliability of standard parameters
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Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005) https://doi.org/10.1117/12.611248
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic
Abstract
We present experimental results of reshaping and making uniform the spatial energy distrubution of raw beams respectively emitted by a low-coherence excimer laser and by a highly coherent diode pumped Nd-YAG laser. We used an optical system which is able to homegenize "bad beams" having strong local intensity spikes, and to modulate almost continously the spot size of the homogenized beam along one or both axes in a fixed target plane. We have evaluated the results using the standard parameters described in the document of the International Organization for Standardization ISO 13694. We found that the reliability of the results is dependent both on teh experimental setup and on the definition of edge steepness and plateau uniformity of the quoted ISO document. Here we propose an amendment to the definition of these standard parameters that could improve their reliability.
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P. Di Lazzaro, P. Di Lazzaro, S. Bollanti, S. Bollanti, D. Murra, D. Murra, E. Tefouet Kana, E. Tefouet Kana, G. Felici, G. Felici, } "Flat-top shaped laser beams: reliability of standard parameters", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); doi: 10.1117/12.611248; https://doi.org/10.1117/12.611248
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