DIFFRACTIVE OPTICS

Fabrication and characterization of hybrid-glass-based axicons

[+] Author Affiliations
Terho Kololuoma, Kari Kataja, Sanna Juuso, Janne Aikio

VTT Electronics, Kaitova¨yla¨ 1, Fin-90570?Oulu, Finland E-mail: terho.kololuoma@vtt.fi

Juha T. Rantala

GuideOptics Oy, P.O. Box 114, Fin-90100?Oulu, Finland

Opt. Eng. 41(12), 3136-3140 (Dec 01, 2002). doi:10.1117/1.1518993
History: Received Feb. 28, 2002; Revised May 8, 2002; Accepted May 8, 2002; Online December 03, 2002
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We introduce a process for applying directly UV photopatternable materials and processing methods for the fabrication of binary diffractive optical elements. We design and model a binary axicon—an optical element that produces an almost diffraction free beam at a specified distance from the element. We also synthesize sol-gel-based hybrid glass materials and tailor their processing parameters to fit to the demands of the axicon design. A grating periodicity of 2 μm, an 850-nm structure depth, and certain morphological properties are required to meet the design parameters. The materials are synthesized using zirconium(IV)isopropoxide, methacrylic acid and methacryloxypropyltrimethoxysilane as deposition material precursors. We determine the morphological and shape characteristics of the fabricated axicons as a function of the lithographic exposure parameters. The optical characteristics of the axicons are measured in terms of the axial and radial intensity profiles. The difference between the modeled and measured results is explained. © 2002 Society of Photo-Optical Instrumentation Engineers.

© 2002 Society of Photo-Optical Instrumentation Engineers

Citation

Terho Kololuoma ; Kari Kataja ; Sanna Juuso ; Janne Aikio and Juha T. Rantala
"Fabrication and characterization of hybrid-glass-based axicons", Opt. Eng. 41(12), 3136-3140 (Dec 01, 2002). ; http://dx.doi.org/10.1117/1.1518993


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