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

Image Number 3 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
Flood protection apparatus and container data center including the same
Variants of a family 44 xyloglucanase
Lightning-protective explosion-preventive fastener
Curable inks comprising surfactant-coated magnetic nanoparticles
Control system for an internal combustion engine
Network decoys
Silicon carbide substrate, epitaxial wafer and manufacturing method of silicon carbide substrate
  Randomly Featured Patents
Protective goggle
Screen assembly for separating particulate material
Heat treatment of metals in a controlled surface atmosphere
Mechanical tube expander with four axis control
Speed responsive motor shutoff mechanism for fluid operated tool
Furniture base with central collector
Low-shrinkage hybrid yarns production thereof and use thereof
Method for preparing high molecular weight meningococcal Group C vaccine
Adhesive systems and products formed using same and methods for producing said adhesive systems and products
Vehicle wheel