Optical diffraction grating

Details Optical diffraction grating Optical diffraction grating

G - Physics

02

B

G02B 5/18 (2006.01) G02B 5/30 (2006.01) G02B 6/124 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2248042

An optical diffraction grating is formed from a region of photonic crystalline material (1). Light is coupled into the photonic crystalline material, and the grazingly emergent ouptut beam is collected. The photonic crystalline material may comprise an array of holes formed in a substrate (2) of dielectric material, e.g. InP, and integrated with planar waveguide structures (4).

Un réseau de diffraction optique est formé à partir d'une zone de matériau cristallin photonique (1). Un couplage lumineux est effectué dans le matériau cristallin photonique et le faisceau diffracté émergent rasant est collecté. Le matériau cristallin photonique peut comporter une rangée de perforations effectuées dans un substrat (2) de matière diélectrique, p. ex. de phosphure d'indium, et elle peut être intégrée à des structures de guides d'ondes planaires (4).

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