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Optical waveguide element

  • US 9,927,637 B2
  • Filed: 03/01/2017
  • Issued: 03/27/2018
  • Est. Priority Date: 06/26/2015
  • Status: Active Grant
First Claim
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1. An optical waveguide element, comprising:

  • as a core section, a rib waveguide including (i) a protruding section and (ii) two non-protruding sections shorter than the protruding section and so arranged in a first direction as to sandwich the protruding section,the core section having a first core region and a second core region overlapping with each other in a second direction, which is perpendicular to the first direction, and configured to form a PN junction,the optical waveguide element being configured to form, between the first core region and the second core region, a depletion layer extending from the protruding section to both of the two non-protruding sections,the depletion layer having a position in the second direction in each of the two non-protruding sections which position is lower than a position, in the second direction, of the depletion layer in the protruding section.

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