Pulse-duration dependency of femtosecond laser refractive index modification in poly(methyl methacrylate)

A. Baum, P.J. Scully, W. Perrie, D. Jones, R. Issac, D.A. Jaroszynski

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Refractive index modification of pure poly(methyl methacrylate) (PMMA) is investigated as a function of pulse duration using femtosecond lasers at 800 and 387 nm wavelength. It is observed that at 800 nm, the refractive index is modified more efficiently as the pulse duration decreases below 100 fs, whereas at 387 nm, efficient index modification is accomplished with longer, 180 fs pulses. Results suggest that threeand two-photon absorption is responsible for modification of pure PMMA at 800 nm and 387 nm, respectively. Repeated irradiation with short pulses of low laser fluence allows control of the photomodification via incubation, thus reducing bulk damage. © 2008 Optical Society of America
LanguageEnglish
Pages651-653
Number of pages2
JournalOptics Letters
Volume33
Issue number7
Publication statusPublished - 1 Apr 2008

Fingerprint

polymethyl methacrylate
pulse duration
refractivity
lasers
pulses
fluence
damage
irradiation
photons
wavelengths

Keywords

  • INDUCED BREAKDOWN
  • POLYMETHYLMETHACRYLATE
  • IRRADIATION
  • DIELECTRICS
  • FS

Cite this

Baum, A. ; Scully, P.J. ; Perrie, W. ; Jones, D. ; Issac, R. ; Jaroszynski, D.A. / Pulse-duration dependency of femtosecond laser refractive index modification in poly(methyl methacrylate). In: Optics Letters. 2008 ; Vol. 33, No. 7. pp. 651-653.
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Pulse-duration dependency of femtosecond laser refractive index modification in poly(methyl methacrylate). / Baum, A.; Scully, P.J.; Perrie, W.; Jones, D.; Issac, R.; Jaroszynski, D.A.

In: Optics Letters, Vol. 33, No. 7, 01.04.2008, p. 651-653.

Research output: Contribution to journalArticle

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AU - Issac, R.

AU - Jaroszynski, D.A.

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N2 - Refractive index modification of pure poly(methyl methacrylate) (PMMA) is investigated as a function of pulse duration using femtosecond lasers at 800 and 387 nm wavelength. It is observed that at 800 nm, the refractive index is modified more efficiently as the pulse duration decreases below 100 fs, whereas at 387 nm, efficient index modification is accomplished with longer, 180 fs pulses. Results suggest that threeand two-photon absorption is responsible for modification of pure PMMA at 800 nm and 387 nm, respectively. Repeated irradiation with short pulses of low laser fluence allows control of the photomodification via incubation, thus reducing bulk damage. © 2008 Optical Society of America

AB - Refractive index modification of pure poly(methyl methacrylate) (PMMA) is investigated as a function of pulse duration using femtosecond lasers at 800 and 387 nm wavelength. It is observed that at 800 nm, the refractive index is modified more efficiently as the pulse duration decreases below 100 fs, whereas at 387 nm, efficient index modification is accomplished with longer, 180 fs pulses. Results suggest that threeand two-photon absorption is responsible for modification of pure PMMA at 800 nm and 387 nm, respectively. Repeated irradiation with short pulses of low laser fluence allows control of the photomodification via incubation, thus reducing bulk damage. © 2008 Optical Society of America

KW - INDUCED BREAKDOWN

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