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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 28 — Dec. 31, 2012
  • pp: 29890–29899

Two-photon polymerization with variable repetition rate bursts of femtosecond laser pulses

Tommaso Baldacchini, Scott Snider, and Ruben Zadoyan  »View Author Affiliations


Optics Express, Vol. 20, Issue 28, pp. 29890-29899 (2012)
http://dx.doi.org/10.1364/OE.20.029890


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Abstract

We describe fabrication of microstructures by two-photon polymerization using bursts of femtosecond laser pulses. With the aid of an acousto-optic modulator driven by a function generator, two-photon polymerization is performed at variable burst repetition rates. We investigate how the time between the bursts of laser pulses influences the ultimate dimensions of lines written in a photosensitive resin. We observe that when using the same laser fluence, polymer lines fabricated at different burst repetition rates have different dimensions. In particular, the widths of two-photon polymerized lines become smaller with decreasing burst repetition rates. Based on the thermal properties of the resin and experimental writing conditions, we attribute this effect to localized heat accumulation.

© 2012 OSA

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.5470) Materials : Polymers
(220.4000) Optical design and fabrication : Microstructure fabrication
(350.3390) Other areas of optics : Laser materials processing

ToC Category:
Laser Microfabrication

History
Original Manuscript: October 8, 2012
Revised Manuscript: December 8, 2012
Manuscript Accepted: December 14, 2012
Published: December 21, 2012

Citation
Tommaso Baldacchini, Scott Snider, and Ruben Zadoyan, "Two-photon polymerization with variable repetition rate bursts of femtosecond laser pulses," Opt. Express 20, 29890-29899 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-28-29890


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