Phase modulator and phase modulating method

Details Phase modulator and phase modulating method Phase modulator and phase modulating method

G - Physics

02

F

G02F 1/01 (2006.01) G02B 26/08 (2006.01) H04B 10/04 (2006.01) H04B 10/155 (2006.01) H04L 9/38 (2006.01)

Patent

CA 2421631

In case of the high-speed operation, it is difficult to ignore the time required for the voltage to rise to the level of voltage to be applied and the time to fall to 0V when the voltage is applied to the phase modulator. The first phase modulator and the second phase modulator are connected in parallel, and the optical path is switched by the switching unit of the control unit between the first optical switch and the second optical switch. The switching unit of the control unit supplies the phase modulation data stored in the phase modulation data memory to the first voltage generating unit or the second voltage generating unit to generate the voltage necessary for the phase modulation.

Pendant un fonctionnement à grande vitesse, il est possible de ne pas tenir compte du temps de montée de la tension appliquée à un modulateur de phase nécessaire pour qu'elle atteigne une valeur cible, et du temps de descente nécessaire pour que ladite tension tombe à zéro. Un premier et un second modulateurs de phase (71, 73) sont montés en parallèle. Une section de commutation (55) d'une unité de commande (51) commute un premier et un second dispositifs optiques (33, 35) afin de modifier un chemin optique. La section de commutation (55) fournit des données (31) de modulation de phase, stockées dans une mémoire (53) de données de modulation de phase, à un premier et second générateurs de tension (57, 59) qui produit la tension nécessaire à une modulation de phase.

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