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Femtosecond laser-assisted three-dimensional microfabrication in silica

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Abstract

We demonstrate direct three-dimensional (3-D) microfabrication inside a volume of silica glass. The whole fabrication process was carried out in two steps: (i) writing of the preprogrammed 3-D pattern inside silica glass by focused femtosecond (fs) laser pulses and (ii) etching of the written structure in a 5% aqueous solution of HF acid. This technique allows fabrication of 3-D channels as small as 10 μm in diameter inside the volume with any angle of interconnection and a high aspect ratio (10μm-diameter channels in a 100μm-thick silica slab).

© 2001 Optical Society of America

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