Nonlinear interferometer for fiber optic dense wavelength...

G - Physics – 02 – B

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G02B 5/28 (2006.01) G01J 3/26 (2006.01) G02B 6/34 (2006.01) H04B 10/02 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2327654

A nonlinear interferometer wavelength separation mechanism (400) for use in a dense wavelength division multiplexer is provided. The mechanism includes a first glass plate (480A) optically coupled to a second glass plate (480B), forming a space therebetween; a mechanism (430) for introducing a phase shift in at least one channel of an optical signal; and a mechanism (400) (420) for broadening a pass band of the optical signal. The nonlinear interferometer (400) of the present invention allows a dense wavelength division multiplexer to have an ease in alignment and a higher tolerance to drifts due to the increase in the width of the pass band. It also has the added ability of being passively stable to temperature.

La présente invention concerne un mécanisme de séparation de longueur d'onde d'interféromètre non linéaire destiné à un multiplexeur à division de longueur d'onde dense. Le mécanisme comprend une première plaque de verre optiquement couplée à une seconde plaque de verre, avec un espace entre elles, un mécanisme d'introduction de décalage de phase sur au moins un canal d'un signal optique, et un mécanisme d'élargissement d'une bande passante du signal optique. L'interféromètre linéaire de la présent invention résulte, pour un multiplexeur à division de longueur d'onde dense, en une facilité d'alignement et en une tolérance plus importante aux déplacements en raison d'une augmentation de largeur de la bande passante. Il présente aussi un comportement additionnel de stabilité passive à la température.

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