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
Display device substrate, method for manufacturing the same, display device, method for forming multi-layer wiring, and multi-layer wiring substrate
Integrated control system for stability control of yaw, roll and lateral motion of a driving vehicle using an integrated sensing system to determine longitudinal velocity
Apparatus and method to simulate a power trip to a disk drive
Method of and apparatus for laser drilling holes with improved taper
Vehicle detection apparatus and method using magnetic sensor
Use of Lactobacillus for liver protection
Processing biomass
  Randomly Featured Patents
Receiving operation controller of communication apparatus
Ink jet recording head and ink jet recording apparatus
Ink receptive compositions and articles for image transfer
Evaluating graphic image files for objectionable content
Stamping of age-hardenable aluminum alloy sheets
System for detecting an accurate amount of ink consumption in an ink jet recording device
Proxy FHRP for anycast routing service
Progressive image quality control using watermarking
Interconnection element for multifiber cables
Vertical MOS transistor device with asymmetrical source and drain and its manufacturing method