Dielectric Masks

Patterning of optical coatings by laser ablation for the fabrication of dielectric masks and diffractive phase elements

[+] Author Affiliations
Ju¨rgen Ihlemann, Dirk Scha¨fer

Laser-Laboratorium Go¨ttingen e.V., Hans-Adolf-Krebs-Weg 1, 37077?Go¨ttingen, Germany E-mail: jihle@llg.gwdg.de

J. Micro/Nanolith. MEMS MOEMS. 3(3), 455-458 (Jul 01, 2004). doi:10.1117/1.1759328
History: Received May 22, 2003; Revised Oct. 30, 2003; Accepted Nov. 26, 2003; Online July 19, 2004
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Excimer laser ablation is a versatile method to generate 2- or 3-D microstructured devices for mechanics, fluidics, and optics. Particularly, if in 1-D the structure is predefined by a layer design, and the other two dimensions are defined in the layer ablation process by mask projection, very precise structure definition in three dimensions and ablated surfaces with optical quality can be achieved. By patterning optical layers or layer stacks, a variety of applications is possible. Two examples are demonstrated. 1. Dielectric masks (amplitude masks) are fabricated by structuring a highly reflective dielectric layer stack. These masks can be used in high power laser machining systems. 2. Diffractive optical elements (phase elements) are generated by structured ablation of a transparent layer. The performance of these elements in shaping excimer laser beams is demonstrated. © 2004 Society of Photo-Optical Instrumentation Engineers.

© 2004 Society of Photo-Optical Instrumentation Engineers

Citation

Ju¨rgen Ihlemann and Dirk Scha¨fer
"Patterning of optical coatings by laser ablation for the fabrication of dielectric masks and diffractive phase elements", J. Micro/Nanolith. MEMS MOEMS. 3(3), 455-458 (Jul 01, 2004). ; http://dx.doi.org/10.1117/1.1759328


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