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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 20 — Sep. 28, 2009
  • pp: 17970–17975

Axial birefringence induced focus splitting in lithium niobate

Guangyong Zhou, Alexander Jesacher, Martin Booth, Tony Wilson, Airán Ródenas, Daniel Jaque, and Min Gu  »View Author Affiliations

Optics Express, Vol. 17, Issue 20, pp. 17970-17975 (2009)

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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.

© 2009 OSA

OCIS Codes
(180.0180) Microscopy : Microscopy
(260.1180) Physical optics : Crystal optics
(260.1440) Physical optics : Birefringence

ToC Category:
Physical Optics

Original Manuscript: August 14, 2009
Revised Manuscript: September 17, 2009
Manuscript Accepted: September 18, 2009
Published: September 22, 2009

Guangyong Zhou, Alexander Jesacher, Martin Booth, Tony Wilson, Airán Ródenas, Daniel Jaque, and Min Gu, "Axial birefringence induced focus splitting in lithium niobate," Opt. Express 17, 17970-17975 (2009)

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