The device comprises a layer of silicon separated from a substrate by a layer of insulating material. A rib having an upper surface and two side surfaces is formed in the layer of silicon to provide a waveguide for the transmission of optical signals. A lateral doped junction is formed between the side surfaces of the rib such that an electrical signal can be applied across the junction to control the density of charge carriers across a substantial part of the cross-sectional area of the rib thereby actively altering the effective refractive index of the waveguide.
申请公布号
US5908305(A)
申请公布日期
1999.06.01
申请号
US19980083395
申请日期
1998.05.22
申请人
BOOKHAM TECHNOLOGY LIMITED
发明人
CRAMPTON, STEPHEN JAMES;HARPIN, ARNOLD PETER ROSCOE;RICKMAN, ANDREW GEORGE