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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 20 — Oct. 15, 2012
  • pp: 4266–4268

Fabrication of microlens arrays in polycarbonate with nanojoule energy femtosecond laser pulses

Trevor Meunier, Ana B. Villafranca, Ravi Bhardwaj, and Arnaud Weck  »View Author Affiliations

Optics Letters, Vol. 37, Issue 20, pp. 4266-4268 (2012)

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We report fabrication of smooth microlens arrays by focusing a nanojoule energy, high repetition rate femtosecond laser oscillator inside a polycarbonate sample. Heat accumulation at the laser focal point and subsequent material expansion leads to localized swelling at the sample surface that behaves as a microlens. By changing the depth of the laser focus in the sample, the focal length of the microlens can be controlled and varies from 40 to 80 μm while maintaining a high numerical aperture of 0.6. This fabrication technique is a single step, controllable, and economical process that can produce arrays of optically smooth microlenses.

© 2012 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.7090) Lasers and laser optics : Ultrafast lasers

ToC Category:
Lasers and Laser Optics

Original Manuscript: August 29, 2012
Manuscript Accepted: September 8, 2012
Published: October 11, 2012

Trevor Meunier, Ana B. Villafranca, Ravi Bhardwaj, and Arnaud Weck, "Fabrication of microlens arrays in polycarbonate with nanojoule energy femtosecond laser pulses," Opt. Lett. 37, 4266-4268 (2012)

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