Etching of fused silica fiber by metallic laser-induced backside wet etching technique

Cs Vass, B. Kiss, J. Kopniczky, B. Hopp

Research output: Contribution to journalArticle

3 Citations (Scopus)


The tip of multimode fused silica fiber (core diameter: 550 μm) was etched by metallic laser-induced backside wet etching (M-LIBWE) method. Frequency doubled, Q-switched Nd:YAG laser (λ = 532 nm; τ FWHM = 8 ns) was used as laser source. The laser beam was coupled into the fiber by a fused silica lens with a focal length of 1500 mm. The other tip of the fiber was dipped into liquid gallium metallic absorber. The etching threshold fluence was measured to be 475 mJ/cm 2 , while the highest fluence, which resulted etching without breaking the fiber, was 1060 mJ/cm 2 . The progress of etching was followed by optical microscopy, and the etch rate was measured to be between 20 and 37 nm/pulse depending on the applied laser energy. The surface morphologies of the etched tips were studied by scanning electron microscopy. A possible application of the structured fibers was also tested.

Original languageEnglish
Pages (from-to)241-244
Number of pages4
JournalApplied Surface Science
Publication statusPublished - Aug 1 2013


  • Fused silica fiber
  • Gallium
  • Indirect laser etching
  • Metallic LIBWE

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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