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US 7,093,986 B2Granted
Low cost optical module
OwnerMarco Scofet, Cristiana Contardi +2inventors
InventorsMarco Scofet, Cristiana Contardi, Salvatore Sabbatino, Stefano Genisio
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Abstract
The present invention comprises an optical module, passively aligned and used in high-speed optical communication systems, having a ferrule disposed in an aperture in an upper plate of the module. The ferrule protrudes a predetermined distance through the aperture in order to guarantee butt coupling of an optical fibre to an active optical component disposed at a predetermined height on a lower plate of the module.
Claims15
A method of passively aligning a high-speed optical module, said method comprising the steps of:
- disposing a ferrule within an aperture of an upper plate at a predetermined distance from said upper plate,
- disposing at least one active high speed optical component on a lower plate at a predetermined height above an upper surface of said lower plate, wherein said predetermined distance and said predetermined height are such that efficient optical coupling in the axial direction is achieved between a fibre disposed within said ferrule and said at least one active high speed optical component,
- visually aligning said upper plate with respect to said lower plate using overlapping images of the fibre and the at least one high speed optical component such that efficient optical coupling in the planar direction is achieved between said fibre disposed within said ferrule and said at least one active high speed optical component, and
- sealing said upper plate to said lower plate.
1 more element
Dependencies are inferred from the claim text.