Patent · US Expired

Reduction of truncation loss of a tapered active waveguide

US6973241B2 · kind B2 · utility

2Cited by
2References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 19, 2003
Grant dateDec 6, 2005
Priority date—
Expiry dateAug 24, 2023

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01S5/1064
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A semiconductor optical device comprises an active waveguide having a tapered portion, and a passive waveguide extending beyond the end of the active waveguide and optically coupled to the tapered portion of the active waveguide. The passive waveguide beyond the end of the active waveguide supports an optical mode of larger size than the optical mode supported by the active waveguide. The tapered portion of the active waveguide is truncated and the separation between the active waveguide and the passive waveguide is greater than in previously known devices in order to minimize or at least reduce the truncation loss at the truncation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.