Chromatic dispersion compensator and chromatic dispersion...

H - Electricity – 04 – B

Patent

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H04B 10/18 (2006.01)

Patent

CA 2194628

In a chromatic dispersion compensator, an optical signal directing unit such as an optical circulator or a directional coupler having a first, second, third and fourth ports. The optical signal directing unit directs an optical signal inputted from one of the ports to another port of the ports. A reflection-type compensator including a dispersion compensating fiber, a reflecting portion and changing unit for changing a polarization direction of a reciprocating signal light, in which the dispersion compensating fiber is connected to the reflecting portion via the changing unit. An input transmission path which is connected to the first port; and an output transmission path which is connected to the fourth port so that the signal light is outputted from the fourth port. The reflection-type compensating unit is connected to one of the second and third ports, and the chirped grating is connected to the other port.

Dans un compensateur de dispersion chromatique, unité de direction de signal optique telle qu'un circulateur optique ou un coupleur directif ayant un premier, un deuxième, un troisième et un quatrième accès. L'unité de direction de signal dirige un signal optique provenant d'un des accès vers un autre des accès. Un compensateur à réflexion comprend une fibre compensatrice de dispersion, un élément réfléchissant et une unité de changement pour changer l'orientation de la polarisation d'un signal lumineux alternant, la fibre compensatrice de dispersion étant raccordée à l'élément réfléchissant par l'unité de changement. Un chemin de transmission d'entrée est raccordé au premier accès et un chemin de transmission de sortie est raccordé au quatrième accès de sorte que le signal lumineux est produit en sortie au quatrième accès. Le compensateur à réflexion est raccordé au deuxième ou au troisième accès, et le réseau de diffraction à réduction est raccordé à l'autre accès.

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