Design of a four-branch optical power splitter based on gallium-nitride using rectangular waveguide coupling for telecommunication links

Retno Wigajatri Purnamaningsih (1) , Nji Raden Poespawati (1) , El Hadj Dogheche (2)

1 UI - Universitas Indonesia
2 IEMN-DOAE - Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520

This paper reports design of a simple four-branch optical power splitter using five parallel rectangular waveguides coupling in a gallium-nitride (GaN) semiconductor/sapphire for telecommunication links. The optimisation was conducted using the 3D FD-BPM method for long wavelength optical communication. The result shows that, at propagation length of 925 μ m, the optical power input was successfully split into four uniform output beams, each with 24% of total input power. It is also shown that the relative output power distribution is almost stable through the C-band range. At the operating wavelength of 1.55 μ m, the proposed power splitter has an excess loss lower than 0.2 dB. This study demonstrates the opportunity to develop optical interconnections from UV-Visible to near IR wavelengths.

Domaines: Optique / photonique

Retno Wigajatri Purnamaningsih, Nji Raden Poespawati, El Hadj Dogheche. Design of a four-branch optical power splitter based on gallium-nitride using rectangular waveguide coupling for telecommunication links. Journal of Engineering, 2019, 2019, pp.7285305. ⟨10.1155/2019/7285305⟩. ⟨hal-03138563⟩