Optical wavelength division multiplexer/demultiplexer having...

H - Electricity – 04 – J

Patent

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H04J 14/02 (2006.01) G02B 6/34 (2006.01) G02B 6/42 (2006.01)

Patent

CA 2375739

An optical wavelength division multiplexer and demultiplexer for single mode or multi-mode fiber optic communi-cation systems is provided. The device includes in its preferred embodiment a prefabricated optical block (20) having a reflective coating (85) on its flat upper surface (21) and a plurality of n filters (40) carried on its flat lower surface (22). A molded plastic coupling module (60) has a flat upper surface (61) to which the optical block (20) and filters (40) are adhesively mounted and the coupling module (60) also includes a lower surface (62) having a plurality of n aspheric lenses (70). In the preferred embodiment, a fiber optic cable receptable (80) is molded to the coupling module (60) along with a collimating lens (65) and a beam reflector (66) so that, when the components are assembled, the optical pathway is passively aligned and no postfabrication alignment adjusting or tuning is required.

L'invention concerne un multiplexeur/démultiplexeur optique pour des systèmes de communication à fibres optiques en monomode ou multimode. Le dispositif comprend, selon un mode de réalisation préféré, un bloc optique préfabriqué dont la surface supérieure plate est revêtue d'une couche réfléchissante et dont la surface inférieure plate reçoit une pluralité n de filtres. Un module d'assemblage plastique moulé présente une surface supérieure plate sur laquelle sont collés le bloc optique et les filtres et comprend une surface inférieure ayant une pluralité n de lentilles asphériques. Selon un mode de réalisation préféré, un réceptacle pour câbles de fibre optique est moulé dans le module d'assemblage avec une lentille collimatrice et un réflecteur de faisceau de manière que, lorsque les composants sont assemblés, le trajet optique soit aligné de manière passive sans avoir à accorder ou régler l'alignement après la fabrication.

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