Design of ultrawide-band, high-sensitivity p-i-n photodetectors

Kazutoshi Kato, Susumu Hata, Kenji Kawano, Atsuo Kozen

Research output: Contribution to journalArticlepeer-review

105 Citations (Scopus)


We show the design of the bandwidth and the external quantum efficiency (including the coupling efficiency to a single-mode fiber) of p-i-n photodetectors. Based on their design procedures, the performance limits of both conventional surface-illuminated photodetectors and side-illuminated photodetectors are evaluated. We point out that in the ultrawide-band region, optical waveguide photodetectors have great advantages over conventional surface-illuminated photodetectors in terms of the product of the bandwidth and the external quantum efficiency. It is shown that a 100-GHz bandwidth can be achieved with little degradation of the external quantum efficiency by a multimode waveguide photodetector structure. We also present a design concept for overcoming the performance limits of solitary waveguide photodetectors by including an input tapered optical waveguide.

Original languageEnglish
Pages (from-to)214-221
Number of pages8
JournalIEICE Transactions on Electronics
Issue number2
Publication statusPublished - Feb 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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