Optical-to-electric transducer with extended dynamic range

H - Electricity – 04 – B

Patent

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Details

H04B 10/02 (2006.01) H04B 10/158 (2006.01) H04B 10/16 (2006.01) H04B 10/17 (2006.01) H01S 3/067 (2006.01) H01S 3/131 (2006.01)

Patent

CA 2062216

Optical receivers in optical communication systems should have a great dynamic range, since the receiver should be able to process optical signals whose levels may vary widely depending on the location of the receiver. According to the invention, an optical amplifier, par- ticularly a fiber amplifier, is provided through which the incoming optical signal passes before entering the transducer proper and whose gain or attenuation factor us controlled in accordance with the electric output signal of the transducer.

Les récepteurs optiques utilisés dans les systèmes de communication devraient posséder une grande latitude de mesure puisque le récepteur doit être capable de traiter des signaux optiques dont les niveaux varient fortement en fonction de l'endroit où le récepteur se trouve. Selon l'invention, les systèmes sont équipés d'un amplificateur optique, particulièrement un amplificateur à fibres optiques par lequel passent tous les signaux optiques entrant avant d'être introduits dans le transducteur; les facteurs de gain ou d'atténuation de ces signaux sont contrôlés en fonction du signal électrique de sortie du transducteur.

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