Design, analysis and fabrication of refractive beam shaping elements for optical storage applications

Brenner, Karl-Heinz ; Kümmel, Peter ; Zeitner, Uwe

Document Type: Conference or workshop publication
Year of publication: 2001
Book title: Laser beam shaping II : 2 - 3 August 2001, San Diego, USA
The title of a journal, publication series: Proceedings of SPIE
Volume: 4443
Page range: 93-104
Publisher: Dickey, Fred M.
Place of publication: Bellingham, Wash.
Publishing house: SPIE
ISBN: 0-8194-4157-0
Publication language: English
Institution: School of Business Informatics and Mathematics > Optoelektronik (Brenner 1999-2008)
Subject: 004 Computer science, internet
Keywords (English): beam shaping , DVD , elliptical gaussian beam , gaussian to flat-top-converter , laser , optical data storage , power efficiency , refractive
Abstract: For the next generation of DVD we have designed an "asymmetric Gaussian to flat-top" converter which uses two refractive optical elements. The design method is based on conservation of energy. This approach leads to an analytically numerical nonparaxial wave-propagation as well as by experimental characterization. In detail, we have studied the tolerance to phase noise, the tolerance to deviations from the specified form and the tolerance to positioning errors. We observed, that the flat-top-intensity shows a very height sensitivity to phase noise. The sensitivity is increased by the intensity distribution in the focal plane of the high NA-focusing lens are investigated. First experimental results of a shaping element fabricated by direct write in resist are presented.

Dieser Eintrag ist Teil der Universitätsbibliographie.

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