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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 19978–19989

Focussing over the edge: adaptive subsurface laser fabrication up to the sample face

P. S. Salter and M. J. Booth  »View Author Affiliations

Optics Express, Vol. 20, Issue 18, pp. 19978-19989 (2012)

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Direct laser writing is widely used for fabrication of subsurface, three dimensional structures in transparent media. However, the accessible volume is limited by distortion of the focussed beam at the sample edge. We determine the aberrated focal intensity distribution for light focused close to the edge of the substrate. Aberrations are modelled by dividing the pupil into two regions, each corresponding to light passing through the top and side facets. Aberration correction is demonstrated experimentally using a liquid crystal spatial light modulator for femtosecond microfabrication in fused silica. This technique allows controlled subsurface fabrication right up to the edge of the substrate. This can benefit a wide range of applications using direct laser writing, including the manufacture of waveguides and photonic crystals.

© 2012 OSA

OCIS Codes
(090.1000) Holography : Aberration compensation
(140.3390) Lasers and laser optics : Laser materials processing
(220.4000) Optical design and fabrication : Microstructure fabrication
(250.5300) Optoelectronics : Photonic integrated circuits
(130.2755) Integrated optics : Glass waveguides
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Laser Microfabrication

Original Manuscript: July 5, 2012
Revised Manuscript: August 9, 2012
Manuscript Accepted: August 9, 2012
Published: August 15, 2012

P. S. Salter and M. J. Booth, "Focussing over the edge: adaptive subsurface laser fabrication up to the sample face," Opt. Express 20, 19978-19989 (2012)

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