Optical multiplexer/demultiplexer and manufacturing method...

G - Physics – 02 – B

Patent

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G02B 6/293 (2006.01) G02B 6/32 (2006.01) G02B 6/34 (2006.01) G02B 6/42 (2006.01) G02B 6/38 (2006.01)

Patent

CA 2512101

The present invention provides an optical multiplexer/demultiplexer which can demultiplex a multiplexed optical signal having a number of wavelength bands into respective wavelength regions, or multiplex light having respective wavelength regions in the field of optical communications. That is, light gained by multiplexing light having wavelengths .lambda.1, .lambda.2, .lambda.3 and .lambda.4 is emitted from an optical fiber (9a) and the optical axis thereof is bent by a micro lens (12a) of a micro lens array (14) so that the light is converted to parallel light which is then reflected from a mirror layer (19) so as to enter into a filter layer (17). A filter (17a) transmits only light having wavelength .lambda.1, and light having other wavelengths is reflected and again reflected by the mirror layer (19) so as to enter into the filter layer (17). The optical axis of light that has transmitted through the filter (17a) is bent by a micro lens (12c) so that the light is coupled to an optical fiber (9c). Light having wavelength .lambda.1, .lambda.2, .lambda.3 and .lambda.4 is taken out from the light emitting ends of optical fibers (9c, 9d, 9e and 9f), respectively. 168

L'invention porte sur un multiplexeur/démultiplexeur optique capable de démultiplexer dans leur longueur d'onde originale des signaux optiques multiplexés en plusieurs zones de longueurs d'onde, et de multiplexer des signaux optiques en plusieurs zones de longueurs d'onde. A cette fin, la lumière produite par multiplexage en faisceaux de longueurs d'onde <1, ?2, ?3, ?4 sortant d'une fibre optique (9a), est déviée par les microlentilles (12a) d'un réseau (14a) de microlentilles (12a) pour former des faisceaux parallèles, qui sont réfléchis par une couche miroir (19) et pénètrent dans la couche filtre (17). Comme le filtre (17a) ne transmet que la longueur d'onde ?1, les faisceaux des autres longueurs d'onde sont réfléchis puis reréfléchis, ce qui les fait sortir de la couche (19) miroir pour entrer dans la couche filtre (17). La lumière traversant le filtre (17a) est déviée par une microlentille (12c), puis couplée à une fibre optique (9c). Les faisceaux de longueur d'onde ?1, ?2, ?3, ?4 sont respectivement captés aux extrémités de sortie des fibres optiques (9c, 9d, 9e, 9f).

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