Proton beam writing of erbium-doped waveguide amplifiers

  • T. C. Sum*
  • , A. A. Bettiol
  • , K. Liu
  • , M. Q. Ren
  • , E. Y.B. Pun
  • , S. Venugopal Rao
  • , J. A. Van Kan
  • , F. Watt
  • *Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Buried channel waveguide amplifiers in Er3+-Yb3+ co-doped phosphate glasses were fabricated by proton beam writing using a focused sub-micron beam of 2.0 MeV protons with a fluence ranging from 0.5-6.0 × 1015 particles/cm2. The waveguides were located at a depth of ∼38 μm beneath the surface. Above a threshold fluence of 3.0 × 1015 particles/cm2, a negative refractive index change occurs, preventing any light confinement in the channel. A peak net gain of ∼1.57 dB/cm was measured for waveguides fabricated with a fluence of ∼0.9 × 1015 particles/cm2. These measurements were performed at 1.534 μm signal wavelength, with 100 mW pump power at 975 nm wavelength.

Keywords

  • Buried channel waveguides
  • Erbium
  • IOG-1
  • Phosphate glass
  • Proton beam writing
  • Waveguide amplifier
  • Ytterbium

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