Abstract
The uniform grating coupler which consists of two pairs of reflector layers in the substrate region has been proposed to couple the optical power from single mode fiber to standard 220 nm silicon-on-insulator waveguide. The efficiency of ≈ 79% in a broadband 3 dB bandwidth of ≈ 150 nm is achieved for uniform Bragg grating coupler devices. Further, by making a sequence of chirped and uniform grating, the power coupling efficiency of ≈ 98% at 1550 nm wavelength and 3 dB bandwidth of 35 nm is achieved. The importance and benefits of reflector layers along with its parametric optimization is thoroughly investigated for the calculation of optimum coupling efficiency. This research mainly focus on fiber-to-waveguide/waveguide-to-fiber coupling design. The major contribution of the research focuses on compact and efficient optical interconnection of coupler devices.
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Acknowledgement
This work was supported in part by Ministry of Human Resource Development (MHRD), Government of India. The authors are grateful to Prof. Rajiv Shekhar, Director, Indian Institute of Technology (ISM), Dhanbad for his continuous encourage and inspirations.
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Singh, R., Singh, R.R. & Priye, V. Parametric optimization of fiber to waveguide coupler using Bragg gratings. Opt Quant Electron 51, 256 (2019). https://doi.org/10.1007/s11082-019-1974-x
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DOI: https://doi.org/10.1007/s11082-019-1974-x