26 October 1989 Soft Apertures To Shape High-Power Laser Beams
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Proceedings Volume 1132, High Power Lasers and Laser Machining Technology; (1989) https://doi.org/10.1117/12.961560
Event: 1989 International Congress on Optical Science and Engineering, 1989, Paris, France
Abstract
Soft or apodized apertures with smooth decreasing from centre to edges transmission profiles are used in laser physics for beam shaping. This paper gives the results of the studies of four types of these units for UV, visible and IR lasers. They are made of glasses or crystals with the use of one of the following technologies: 1)absorption induced by ionizing radiation; 2)photodestruction of colour centres or photooxidation of impurities ions; 3)additive colouration; 4)frustrated total internal reflection. The special feature of such apertures is their high optical damage resistance under the irradiation of single--pulse laser radiation. They are approximately 3-50 mm in diameter but the methods of making them give the possibility to create near-Gaussian and flat-top beams with dimensions less than 1 mm and larger than 200 mm. The results of using them in high-power single-pulse lasers are presented herein. Damage thresholds of these apertures in such types of lasers have been defined.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Svetlana G. Lukishova, Pavel P. Pashinin, Sergei Kh. Batygov, and Boris M. Terentiev "Soft Apertures To Shape High-Power Laser Beams", Proc. SPIE 1132, High Power Lasers and Laser Machining Technology, (26 October 1989); doi: 10.1117/12.961560; https://doi.org/10.1117/12.961560
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