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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 29 — Oct. 10, 2012
  • pp: 7039–7045

Resonant effects in nonlinear photon absorption during femtosecond laser ablation of Nd-doped silicate glass

Yadong Zhao, Lan Jiang, Juqiang Fang, Qianghua Chen, Xiaowei Li, and Yongfeng Lu  »View Author Affiliations


Applied Optics, Vol. 51, Issue 29, pp. 7039-7045 (2012)
http://dx.doi.org/10.1364/AO.51.007039


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Abstract

This study investigates the resonant effects in nonlinear photon absorption in femtosecond laser ablation of Nd-doped silicate glass (Nd:glass). During the femtosecond laser ablation process, the resonant ablation threshold fluence is decreased by up to 40% compared with that of ordinary ablation. However, it is found that the resonant effect is closely related with laser intensity, and lower laser intensities are required to achieve a significant enhancement. When the intensity is lower than 2.28×1014W/cm2 at which multiphoton ionization dominates, resonant effect is enhanced by a factor of 1.4 to 4.4. When the intensity is higher than 2.28×1014W/cm2, at which intensity tunnel ionization dominates, the resonant effect becomes weak and gradually fades away. It is shown that the resonant effect is still important for multiphoton ionization yet insignificant for tunnel ionization.

© 2012 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(220.4610) Optical design and fabrication : Optical fabrication

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 29, 2012
Revised Manuscript: September 3, 2012
Manuscript Accepted: September 6, 2012
Published: October 8, 2012

Citation
Yadong Zhao, Lan Jiang, Juqiang Fang, Qianghua Chen, Xiaowei Li, and Yongfeng Lu, "Resonant effects in nonlinear photon absorption during femtosecond laser ablation of Nd-doped silicate glass," Appl. Opt. 51, 7039-7045 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-29-7039

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