Improving quality of the nonlinear optical elements (kdp and dkdp crystals) machining by the flying cutter method

Authors: Obraztsov A.E.
Published in issue: #12(89)/2023
DOI: 10.18698/2541-8009-2023-12-957
Category: Mechanical Engineering and Machine Science | Chapter: Technology and Equipment of Mechanical and Physical Processing
Keywords: flying cutter method, KDP and DKDP machining, micro-milling, aerostatics, ultra-precision machining, precision machining, nonlinear optical elements, anisotropic crystals, fly-cutting method, linear aerostatic guides, aerostatic carriages, diamond cutter machining
Published: 25.01.2024

Superpower lasers are using the anisotropic KDP and DKDP crystals, which are difficult to machine. The resulting micro-cracks and subsurface cracks negatively affect the optical performance. The proposed approach makes it possible to solve these problems in machining the anisotropic KDP and DKDP crystals, which assists to improve the resulting surface quality. The article presents experience and research on machining the anisotropic KDP and DKDP crystals using various approaches and compares various approaches implemented in practice. Based on comparison and identification of the existing implementation advantages and disadvantages, the article proposes a new design of the crystals machining device.

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