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Proceedings Article

Volumetric modifications in fused silica using Gaussian and Bessel femtosecond laser beams

[+] Author Affiliations
Domas Paipulas, Mindaugas Mikutis, Valdas Sirutkaitis

Vilnius Univ. (Lithuania)

Saulius Juodkazis

Swinburne Univ. of Technology (Australia)

Proc. SPIE 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers, 87860D (July 9, 2013); doi:10.1117/12.2020258
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From Conference Volume 8786

  • Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers
  • Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph
  • Shanghai, P. R. China | May 19, 2013

abstract

In this work we present the results on volumetric fused silica modifications using femtosecond Gaussian and Gaussian-Bessel laser beams. We show that for specific photonic device, like volume Bragg grating, fabrication, Bessel beams are more superior to Gaussian, as the recording process is much faster and fabricated devices have better efficiencies. Also Gaussian beam tend to be more efficient in formation of nanogratings that causes the appearance of birefringence in modified zones. This reduces optical quality of fabricated device and limits overall recording velocity. We have successfully fabricated volume Bragg gratings in the bulk of fused silica that had absolute diffraction efficiencies reaching ∼90% using femtosecond Gaussian-Bessel beam, while gratings made with Gaussian beam reached only 60%. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Domas Paipulas ; Mindaugas Mikutis ; Valdas Sirutkaitis and Saulius Juodkazis
" Volumetric modifications in fused silica using Gaussian and Bessel femtosecond laser beams ", Proc. SPIE 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers, 87860D (July 9, 2013); doi:10.1117/12.2020258; http://dx.doi.org/10.1117/12.2020258


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