Filament damage and channel waveguide fabrication in Yb-doped phosphate glass

Jing Lv, Kedian Wang, Guanghua Cheng

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We report on the fabrication of filament damages in Yb-doped phosphate glass by femtosecond laser pulses. The uneven index modification was obtained using a 20× optical microscope objective with 0.4 numerical apertures. The multimode fields of original channel waveguides were investigated and in good agreement with the simulation results, whose structures can be regarded as a kind of beam splitters. Under the optical pump at 976 nm, the end region of the original filament shows continuous wave laser oscillation. The elongated and uniform filaments were fabricated by introducing a circular aperture, so that the guiding performance of tradition-channel single mode was achieved. Both large-mode-area waveguides are expected to find applications in optical communications and high-power lasers and amplifiers.

Original languageEnglish
Article number2050325
JournalModern Physics Letters B
Volume34
Issue number29
DOIs
StatePublished - 20 Oct 2020

Keywords

  • channel waveguide
  • Femtosecond laser fabrication
  • large mode area
  • splitter

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