Resources Contact Us Home
Dynamic controller for a multi-channel optical amplifier

Image Number 4 for United States Patent #6535330.

A dynamic controller for a multi-channel EDFA-type optical amplifier is provided that is capable of providing a substantially tilt-free output over a range of selectable gain set points. The dynamic controller includes a variable optical attenuator coupled between the two amplification coils of the EDFA amplifier, and a control circuit that instructs the attenuator of an amount that each channel should be attenuated to achieve a tilt-free output at a selected gain point. The controller further includes a gain controller and a tilt controller connected to the control circuit of the variable optical attenuator for providing signals indicative of an average amount of per channel attenuation and a relative amount of per channel attenuation necessary to achieve a selected gain set point while reducing or eliminating tilt, respectively.

  Recently Added Patents
Methods and compositions for improved F-18 labeling of proteins, peptides and other molecules
Pre-fetching map data using variable map tile radius
Fixing apparatus
Brushless electric motor or generator in shell construction
Ionic compound, anti-static pressure-sensitive adhesive and polarizer comprising the same
Therapeutic human anti-IL-1R1 monoclonal antibody
  Randomly Featured Patents
Impact-actuated gripping tool
Blood pressure monitoring system
Capacitor and method of forming a capacitor
Semiconductor component and method of manufacture
Double row angular contact ball bearing with one-piece outer ring and one-piece inner ring
Bacterial inosine 5'-monophosphate dehydrogenase ("IMPDH") DNA as a dominant selectable marker in mammals and other eukaryotes
Bucket mountable mop hanger
Method and apparatus for measurement and identification of co-channel interfering transmitters
Mixtures of polymers for medical use
Method for preventing dangerous hydrogen accumulation in nuclear reactor containments