Multimode fiber optic amplifier and method of amplifying...

H - Electricity – 01 – S

Patent

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H01S 3/00 (2006.01) H01S 4/00 (2006.01)

Patent

CA 2616094

A multimode fiber receiver includes a multimode collimator, a multimode fiber optic amplifier and a detector. The collimator receives incoming signals and provides the signals to the amplifier. The amplifier includes plural amplification stages, a limiter, a tunable narrow band filter and a microcontroller. The amplification stages each include a gain element and a noise filter. The limiter receives the amplified signals and limits the energy of those signals. The optical signals subsequently traverse the narrow band filter including an adjustable pass band to provide desired signals to the detector. The microcontroller measures the energy of the incoming and output signals to control the limiter, amplification stages and/or narrow band filter in order to produce signals within the dynamic range of a particular application. The multimode fiber optic amplifier and/or receiver of the present invention is preferably utilized within an optical communication unit.

La présente invention concerne un récepteur à fibre multimode comportant un collimateur multimode, un amplificateur optique à fibre multimode, et un détecteur. Le collimateur reçoit les signaux entrants et fournit les signaux à l'amplificateur. L'amplificateur comporte plusieurs étages d'amplification, un limiteur, un filtre bande étroite accordable, et un contrôleur microprogrammé. Chacun des étages comporte un élément de gain et un filtre de bruits. Le limiteur reçoit les signaux amplifiés et limite l'énergie des signaux considérés. Les signaux optiques traversent ensuite le filtre à bande étroite dont la bande passante est réglable de façon à fournit les signaux attendus au détecteur. Le contrôleur microprogrammé mesure l'énergie des signaux entrants ou sortants de façon à commander le limiteur, les étages d'amplification et/ou le filtre à bande étroite de façon à produire des signaux dans la plage dynamique d'une application particulière. L'amplificateur et/ou récepteur optique à fibre multimode de la présente invention est destiné de préférence à une unité de communications optiques.

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