Resources Contact Us Home
Optical amplifier for use in optical communications equipment

Image Number 15 for United States Patent #6373623.

The output level of pumping light supplied from a pumping light source is varied using a variable attenuator, which is controlled by a variable attenuator driver circuit. By separating a portion containing the pumping light source from a portion containing an amplification medium, it becomes possible to prevent heat emitted by the pumping light source from adversely affecting the amplification medium. By arranging the portion containing the pumping light source such that a pumping light source or sources can be added when necessary, optical transmission system requirements of having more pumping light sources for system upgrade can be accommodated readily. By packaging portions containing amplification media, an optical amplifier can be made small.

  Recently Added Patents
Methods and systems to reduce a number of simulations in a timing analysis
Modular microscope construction
Signal conversion control circuit for touch screen and method thereof
Sending targeted product offerings based on personal information
Radio transmitter and radio receiver with channel condition assessment
Digital camera supporting intelligent self-timer mode and method of controlling the same
Tool box
  Randomly Featured Patents
Methods and system for viewing SAN resources
Data receiver and semiconductor device including the data receiver
Screen display processing apparatus, screen display processing method and computer program
Fuel injector, nozzle body, and manufacturing method of cylindrical part equipped with fluid passage
Sharpening apparatus
Fiber optic microcable produced with radiation cured composite
Open-loop torque control on joint position-controlled robots
Food cooking apparatus with removable conveyor assembly and serpentine heater providing non-uniform heating
Fingerprint detection apparatus