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Open AccessArticle

An Optical Power Divider Based on Mode Coupling Using GaN/Al2O3 for Underwater Communication

1
Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia
2
Université Polytechnique Hauts de France, CNRS IEMN DOAE, 59300 Valenciennes, France
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper: A GaN/sapphire 1 × 4 Optical Power Splitter Using Five Rectangular Waveguide for Underwater Application. Purnamaningsih, R.W.; Hamidah, M.; Fithriaty, D.; Gumelar, M.R.; Poespawati, N.R.; Dogheche, E. In Proceeding of 2018 IEEE 5th International Conference on Engineering Technologies and Applied Sciences (ICETAS), Bangkok, Thailand, 22–23 November 2018.
Photonics 2019, 6(2), 63; https://doi.org/10.3390/photonics6020063
Received: 7 April 2019 / Revised: 30 May 2019 / Accepted: 31 May 2019 / Published: 3 June 2019
(This article belongs to the Special Issue Advanced Optical Materials and Devices)
This paper details the design of a 1 × 8 optical power divider, using a gallium nitride (GaN) semiconductor on sapphire, which can be applied to underwater optical wireless communication. The design consists of nine parallel rectangular waveguides which are based on mode coupling phenomena. Analysis of the design was performed using the beam propagation method (BPM). The optimization was conducted using the 3D finite difference (FD)-BPM method with an optical signal input at the wavelength required for maritime application of λ = 0.45 µm. The signal was injected into the central waveguide. The results showed that at a propagation length of 1480 µm the optical power is divided into eight output beams with an excess loss of 0.46 dB and imbalance of 0.51 dB. The proposed design can be further developed and applied in future underwater communication technology. View Full-Text
Keywords: optical power divider; underwater communication; GaN; mode coupling; photonic waveguide optical power divider; underwater communication; GaN; mode coupling; photonic waveguide
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Purnamaningsih, R.W.; Poespawati, N.R.; Abuzairi, T.; Dogheche, E. An Optical Power Divider Based on Mode Coupling Using GaN/Al2O3 for Underwater Communication . Photonics 2019, 6, 63.

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