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Citation
E. Bricchi, J. D. Mills, P. G. Kazansky, B. G. Klappauf, and J. J. Baumberg, "Maskless Fresnel Zone Plates for Dense Embedded Optical Components," in Conference on Lasers and Electro-Optics, M. Fejer, F. Leonberger, J. Fujimoto, and S. Newton, eds., OSA Technical Digest (Optica Publishing Group, 2002), paper CMP7.https://opg.optica.org/abstract.cfm?URI=CLEO-2002-CMP7
Abstract
In the last few years femtosecond lasers have proved to be of great utility for micromachining within the bulk of transparent materials.1,2 When an intense femtosecond laser pulse is tightly focused into a transparent material, high-order non-linear absorption allows the energy to be deposited predominantly within the focal volume producing a permanent refractive index modification of up to 10−2 in the bulk of the transparent material. This process allows local patterning inside transparent media into 3D structures, allowing for instance the assembly of many optical components in a single glass block, producing rigid and environmentally tolerant devices.
© 2002 Optical Society of America
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