Fabrication of optical waveguide gratings

Details Fabrication of optical waveguide gratings Fabrication of optical waveguide gratings

G - Physics

02

B

G02B 6/028 (2006.01) G02B 5/18 (2006.01) G02B 6/124 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2307189

Optical grating fabrication apparatus comprises a phase mask for dividing an incident light beam into a plurality of diffracted beams, and a focusing arrangement for receiving light from the phase mask and converging at least two non-zero- order diffracted beams together so as to generate an interference region between the converged beams so that a grating structure can be impressed on an optical waveguide placed in the interference region; the phase mask and at least a part of the focusing arrangement being moveable with respect to one another so as to alter the angle of convergence of the converged beams.

Selon cette invention, un appareil de fabrication de réseaux optiques comprend un masque de phase (40) servant à diviser un faisceau (30) de lumière incidente en plusieurs faisceaux diffractés ainsi qu'un dispositif (60) de mise au point servant à recevoir la lumière provenant du masque de phase et faire converger au moins deux faisceaux diffractés d'ordre non égal à zéro pour créer une zone d'interférence entre les faisceaux convergeants afin que l'on puisse imprimer une structure de réseau sur un guide d'ondes optique (80) placé dans la zone d'interférence. Le masque de phase et au moins une partie du dispositif de mise au point peuvent se déplacer l'un par rapport à l'autre de manière à modifier l'angle de convergence des faisceaux convergents.

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