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Performance comparisons between inverted and conventional avalanche photodiodes for larger capacity applications

Abstract

In this paper, two types of avalanche photodiode (APD) are compared, namely, a P-down APD using an inverted structure and a P-up APD using a conventional structure. Comparison between those two types of APD was made and differences between them were pointed out. We find that the inverted APD structure can prevent undesirable edge breakdown and improve high-speed performance. A maximum 3-dB bandwidth of 23 GHz and a gain–bandwidth product of 276 GHz are obtained for the P-down APD. For larger capacity applications, the P-down APD can play a greater role than the P-up APD.

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Acknowledgements

This work was supported in part by the National Key Research and Development Program of China (2018YFB2200803).

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Correspondence to Xiaofeng Duan.

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Liao, Z., Li, K., Liu, H. et al. Performance comparisons between inverted and conventional avalanche photodiodes for larger capacity applications. Opt Rev 29, 305–309 (2022). https://doi.org/10.1007/s10043-022-00746-z

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  • DOI: https://doi.org/10.1007/s10043-022-00746-z

Keywords

  • Avalanche photodiode
  • P-down APD
  • P-up APD
  • Gain–bandwidth product