Stray light absorber including grating array

US6990275B2 · kind B2 · utility

Assignee

• Avanex Corporation · US

Inventors

• Peter Kersten · Leonberg, DE
• Gerhard Schreiber · Strohberg, DE
• Roland Munzner · Owen, DE

Key dates

• Filing date: Feb 12, 2004
• Grant date: Jan 24, 2006
• Expiry date: Mar 12, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12107
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical component comprising an optical waveguide and adjacent to it at least one grating array adapted to reflect stray light away from said optical waveguide. The use of a grating array with a plurality of structures like polygons or stripes gives the possibility to define a multiple of reflection directions. This is obtained by using polygons layed out in different orientations up to a random one or a Bragg grating preferably defined with a non-uniform period (chirped). Such grating arrays are usually structured within the same layer as the optical waveguide core layer.