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
Storage system comprising multiple microprocessors and method for sharing processing in this storage system
Electronic time stamping apparatus for use with an inground transmitter
Re-establishing push notification channels via user identifiers
Soybean sequences associated with the FAP3 locus
Metal foil laminate, substrate for mounting LED, and light source device
Method and apparatus for eliminating a motor vehicle tip-over risk
Methods of implanting dopant ions
  Randomly Featured Patents
Industrial robot
Channel-bodied surgical needle and method of manufacture
Connector guide system for construction walls
X-ray apparatus
Circuit for generating read and signal and circuit for generating internal clock using the same
UV-stabilized compositions and methods
Optical bidirectional transmission system and method having transmission-line-disconnection detecting function
Fluidic flowmeter
Control unit of active suspension system of vehicle
Bubble generating assembly that produces vertical bubbles