Waveguide end face
AssigneeBookham Technology PLC
InventorsAndrew George Rickman, Arnold Peter Roscoe Harpin
Life of this patent
Estimating the term…
Abstract
An integrated optical waveguide with an end face, the end face being provided on an end portion with a greater width than the waveguide, e.g. in the form of a T-bar provided at the end of the waveguide, whereby the rounding effect produced by the manufacturing process, e.g. etching, used to form the end face does not affect the flatness of the portion of the end face through which light is transmitted. The T-bar is preferably inclined so the normal of the end face is inclined to the optical axis of the waveguide to reduce back reflection therefrom. A plurality of waveguides may terminate in a common T-bar.
Claims12
An integrated optical waveguide having an end face provided on an end portion of the waveguide, the end portion being formed so that the end portion and the end face provided thereon have a width greater than the width of the waveguide leading to the end portion, wherein the end portion has a width of least Ww+2R, where Ww is the width of the waveguide leading to the end portion and R is the radius of curvature of corners of the end portion caused as a result of the manufacturing process used to fabricate the end.
An integrated optical waveguide having an end face provided on an end portion of the waveguide, the end portion being formed so that the end portion and the end face provided thereon have a width greater than the width of the waveguide leading to the end portion, wherein end face is inclined so that its normal makes an angle with the optical axis of the waveguide.
Dependencies are inferred from the claim text.