title: A high efficiency input/output coupler for small silicon photonic devices.
abstract: Coupling light from an optical fibre to small optical waveguides is particularly problematic in semiconductors, since the refractive index of the silica fibre is very different from that of a semiconductor waveguide. There have been several published methods of achieving such coupling, but none are sufficiently efficient whilst being robust enough for commercial applications. In this paper experimental results of our approach called a Dual-Grating Assisted Directional Coupler, are presented. The principle of coupling by this novel method has been successfully demonstrated, and a coupling efficiency of 55% measured.
authors.forename: Goran
authors.initials: G
authors.lastname: Masanovic
authors.forename: Graham
authors.initials: G
authors.lastname: Reed
authors.forename: William
authors.initials: W
authors.lastname: Headley
authors.forename: Branislav
authors.initials: B
authors.lastname: Timotijevic
authors.forename: Vittorio
authors.initials: V
authors.lastname: Passaro
authors.forename: Raghied
authors.initials: R
authors.lastname: Atta
authors.forename: Graham
authors.initials: G
authors.lastname: Ensell
authors.forename: Alan
authors.initials: A
authors.lastname: Evans