Wavelength division multiplexing/demultiplexing devices...

G - Physics – 02 – B

Patent

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G02B 6/34 (2006.01)

Patent

CA 2380512

An improved wavelength division multiplexing device (10) is disclosed. The improved wavelength division multiplexing device (10) has a diffraction grating (18) for combining a plurality of monochromatic optical beams (24) into a multiplexed, polychromatic optical beam. The improvement in the improved wavelength division multiplexing device (10) is the use of a diffractive optic collimating/focusing lens (16) for collimating the plurality of monochromatic optical beams (24) traveling along a first direction (24') to the diffraction grating (18), and for focusing the multiplexed, polychromatic optical beam (26') traveling along a second direction (26) from the diffraction grating (18), wherein the second direction (26') being substantially opposite the first direction (24').

L'invention concerne un dispositif de multiplexage par répartition en longueur d'onde (10), qui comprend un réseau de diffraction (18) permettant de combiner une pluralité de faisceaux optiques monochromatiques (24) avec un faisceau optique polychromatique multiplexé. L'amélioration apportée au dispositif de multiplexage par répartition en longueur d'onde (10) réside dans l'utilisation d'une lentille de focalisation/collimatrice optique à diffraction (16), qui permet de collimater la pluralité de faisceaux optiques monochromatiques (24) se déplaçant le long d'une première direction (24') vers le réseau de diffraction (18), et de focaliser le faisceau optique polychromatique multiplexé (26') se déplaçant le long d'une seconde direction (26) depuis le réseau de diffraction (18), la seconde direction (26') étant sensiblement opposée à la première direction (24').

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