Picosecond and nanosecond pulse delivery through a hollow-core Negative Curvature Fiber for micro-machining applications

Piotr Jaworski, Fei Yu, Robert Raimund Josef Maier, William J Wadsworth, Jonathan C Knight, Jonathan D Shephard, Duncan Paul Hand

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Abstract

We present high average power picosecond and nanosecond pulse delivery at 1030 nm and 1064 nm wavelengths respectively through a novel hollow-core Negative Curvature Fiber (NCF) for high-precision micro-machining applications. Picosecond pulses with an average power above 36 W and energies of 92 mu J, corresponding to a peak power density of 1.5 TWcm(-2) have been transmitted through the fiber without introducing any damage to the input and output fiber end-faces. High-energy nanosecond pulses (>1 mJ), which are ideal for micro-machining have been successfully delivered through the NCF with a coupling efficiency of 92%. Picosecond and nanosecond pulse delivery have been demonstrated in fiber-based laser micro-machining of fused silica, aluminum and titanium. (c) 2013 Optical Society of America

Original languageEnglish
Pages (from-to)22742-22753
Number of pages12
JournalOptics Express
Volume21
Issue number19
DOIs
Publication statusPublished - 23 Sep 2013

Keywords

  • PHOTONIC CRYSTAL FIBER
  • SILICA HOLLOW
  • LASER-PULSES
  • MU-M
  • SPECTRAL REGION
  • OPTICAL-FIBERS
  • BEAM DELIVERY
  • WAVE-GUIDES
  • YAG LASER
  • DAMAGE

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