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Design and modeling of mode-conversion in ring resonator and its application in all-optical switching

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Abstract

The present paper describes the mode conversion of the optical signal using single waveguide coupled silicon micro-ring resonator (MRR). The mode conversion occurs between quasi-TM and the quasi-TE mode at the through port output with the application of the suitable optical pump power. The modeling of mode-conversion using ring resonator is performed through MATLAB as well as by finite-difference-time-domain (FDTD) simulation and further used to perform the all-optical switch. The refractive index contrast, height to width ratio of the waveguide and the choice of suitable wavelength and power for optical pumping and source are responsible for mode-conversion in the ring resonator. The application of mode-conversion to design all-optical switch in MRR is also included in the paper. Mode-conversion in terms of electric field intensity at a resonant wavelength of around 1.53 μm occurs and is utilized to design all-optical switch. The results obtained from both MATLAB and FDTD justify each other and validate the proposed concept. Some ‘Figure of merits’ and ‘Spectral parameters’ are calculated in the report to analyze the performance of the design.

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Acknowledgements

The authors of the paper want to thank Prof. Qingzhong Huang, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China for his valuable discussion and comments.

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Authors and Affiliations

  1. Department of Electronics and Instrumentation Engineering, NIT Agartala, Agartala, Tripura, 799046, India

    Gaurav Kumar Bharti & Jayanta Kumar Rakshit

  2. Department of Electrical Engineering, NIT Agartala, Agartala, Tripura, 799046, India

    Soumya Sanghamitra Pal

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  1. Gaurav Kumar Bharti
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  2. Jayanta Kumar Rakshit
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  3. Soumya Sanghamitra Pal
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Correspondence to Jayanta Kumar Rakshit.

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Bharti, G.K., Rakshit, J.K. & Pal, S.S. Design and modeling of mode-conversion in ring resonator and its application in all-optical switching. Microsyst Technol 25, 295–306 (2019). https://doi.org/10.1007/s00542-018-3964-5

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