Compact and highly efficient grating couplers between optical fiber and nanophotonic waveguides

Frederik Van Laere, Guenther Roelkens, Melanie Ayre, Jonathan Schrauwen, Dirk Taillaert, Dries Van Thourhout, Thomas E. Krauss, Roe Baets

Research output: Contribution to journalArticlepeer-review

368 Citations (Scopus)

Abstract

We present high-efficiency grating couplers for coupling between a single-mode fiber and nanophotonic waveguides, fabricated both in silicon-on-insulator (SOI) and InP membranes using BenzoCycloButene wafer bonding. The coupling efficiency is substantially increased by adding a gold bottom mirror to the structures. The measured coupling efficiency to fiber is 69% for SOI grating couplers and 56% for bonded InP membrane grating couplers.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalIEEE Journal of Lightwave Technology
Volume25
DOIs
Publication statusPublished - Jan 2007

Keywords

  • BenzoCycloButene (BCB) wafer bonding
  • gold mirror
  • grating couplers
  • integrated optics
  • MEMBRANE

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