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- Title
- Axial birefringence induced focus splitting in lithium niobate
- Author(s)
- Zhou, Guangyong; Jesacher, Alexander; Booth, Martin; Wilson, Tony; Rodenas, Airan; Jaque, Daniel; Gu, Min
- Abstract
- We report on the experimental observation of "focus splitting" when light is tightly focused into a uniaxial lithium niobate crystal along its optical axis. This effect consists in the focal spot being split into two major sub-peaks along the axial direction. For the microfabrication applications such as three-dimensional photonic crystal fabrication and waveguide writing, this effect is highly undesired since it can lead to the generation of multiple distinct voxels in the vicinity of the focus. The splitting is caused by different birefringence induced aberrations for the ordinary and extraordinary polarization eigenmodes. We present numerical simulations which support our observations and suggest methods to avoid this effect.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
- Source
- Optics Express, Vol. 17, no. 20 (Sep 2009), pp. 17970-17975
- Publication year
- 2009
- FOR Code(s)
- 0205 Optical Physics
- Keyword(s)
- Focus splitting; Microfabrication; Photonic crystals; Lithium niobate crystals; Waveguides
- Publisher
- Optical Society of America
- ISSN
- 1094-4087
- Publisher URL
- http://dx.doi.org/10.1364/OE.17.017970
- Copyright
- Copyright © 2009 Optical Society of America. Published version of the paper reproduced here in accordance with the copyright policy of the publisher. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.17.017970. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
- Full text
- Peer reviewed
