Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2007-03-30
2008-03-18
Hughes, Deandra (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
C359S337210, C359S341410, C359S341420
Reexamination Certificate
active
07345811
ABSTRACT:
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.
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Bolda Eric
Edell Shapiro & Finnan LLC
Hughes Deandra
ITT Manufacturing Enterprises Inc.
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