Femtosecond laser ablation of DAST
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2003-12
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Journal Article
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Abstract
High rate femtosecond (fs) laser ablation of the organic salt 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate (DAST), an organic crystal with very high optical nonlinearities has been demonstrated. The threshold fluence and the ideal fluence range for damage free ablation for the wavelengths 550, 600, and 775nm have been determined and the quality of the produced grooves has been investigated. The threshold fluences are in the order of 10-70mJ/cm² and the ideal fluence range for damage free ablation is ranging from 30 to 300mJ/cm², depending on the wavelength. The optimal focussing for ablation has been investigated and first results towards the structuring of a ridge waveguide are presented. We conclude that this method is most promising for waveguide patterning of DAST surfaces for integrated optics applications. © 2003 Published by Elsevier B.V.
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published
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Volume
220 (1-4)
Pages / Article No.
88 - 95
Publisher
Elsevier
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Subject
Demtosecond laser ablation; Nonlinear optics; Electro-optics; Organic crystals
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Notes
Received 27 April 2003, Accepted 21 May 2003, Available online 4 July 2003.