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
Fail-safe upgrading of portable electronic device software
Message processing method and apparatus based on the SIP protocol and an IP communication system
Reading apparatus and reading method
Early kill removal graphics processing system and method
Ultra-wideband communication system and method
Pressure-sensitive adhesive composition for optical films, pressure-sensitive adhesive optical film and image display
Polymers derived from benzobis(silolothiophene) and their use as organic semiconductors
  Randomly Featured Patents
Method and apparatus for powered descent guidance
Carrier release sheet for molding compound
Apparatus for transferring xerographic images
Wireless transmission system for PM modulation signal
Integrated heat exchanger
Tweezer or similar article
Actuating device for a high-voltage switch
Toner usage control between differing image regions
Product accessible display container