Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
System and method for updating firmware
Computer product, information retrieval method, and information retrieval apparatus
Data processing apparatus and data processing method for reducing an uneven color made up of two or more ink colors
Liquid formulations of carboxamide arthropodicides
Puncture resistant fabric
Data driver and liquid crystal display device using the same
Method and laser receiver for acoustically indicating a laser beam
  Randomly Featured Patents
Reflector device for a lighting device
Computer able to link electronic mail functions with telephone functions
Multi-luminal catheter, multi-luminal catheter assembly
Process for separation of sulfated glycosaminoglycans
Elastogenic cues and methods for using same
Uniform interface for cryptographic services
Multi-roller electrostatic toning
Programmable logic cell with flexible clocking and flexible feedback
Safety device for use as overpressure protection for a trapped volume space
Optical cell