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Textured Antireflective Surfaces for High-Power Applications

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Textured Antireflective Surfaces for High-Power Applications

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In applications using high-power lasers, antireflective (AR) optics are important to ensure that stray beams are minimized. However, traditional dielectric thinfilm AR coatings can also present problems, as their laser damage threshold is typically lower than that of the optics themselves, limiting the power or intensity achievable in a given setup. In addition, as the number of optics in a system increases, the small reflections from AR coatings can compound, leading to problematic power loss. Thorlabs’ textured AR surfaces present an alternative to thin-film coatings with significantly higher laser damage thresholds. They also provide lower reflectance over a broader range of wavelengths and angles of incidence than is possible with thin-film coatings. As a result, replacing coated optics with textured optics in a highpower system can improve the performance and the robustness to damage during operation.

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