Femtosecond Laser Written Depressed-Cladding Waveguide 2 × 2, 1 × 2 and 3 × 3 Directional Couplers in Tm3+:YAG CrystalстатьяЭлектронная публикацияИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 1 апреля 2020 г.
Аннотация:Ion-doped crystal-based compact devices capable of beam splitting and coupling are
enthralling for a broad range of classical and quantum integrated photonics applications. In this
work, we report on the fabrication of depressed-cladding waveguide 2D 2×2, 1×2 and 3D 3×3
directional couplers in Tm3+:YAG crystal by femtosecond laser writing. The performances of the
couplers are characterized at 810 nm, showing single-mode guidance, polarization independence,
finely matched splitting ratios. These results open up new opportunities in the beneficial fabrication
of 3D circuits and devices in crystals.