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
Photoelectric conversion device
Method and system for remote delivery of email
Far field telemetry operations between an external device and an implantable medical device during recharge of the implantable medical device via a proximity coupling
Methods and systems for automatically identifying a logical circuit failure in a data network
Direct file transfer between subscribers of a communications systems
Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication
Auto-aligning spectroscopy system
  Randomly Featured Patents
Method of forming complementary device structures in partially processed dielectrically isolated wafers
Method and apparatus for focus control of an optical disk drive
Relative time interval measuring instrument
External modular armor assembly
Pane for automobile vehicle
Computer cabinet front panel
Ceiling fan assembly
Cork factory cork holder
Versatile wideband phased array FED reflector antenna system and method for varying antenna system beamwidth
Filtering invalid tokens from a document using high IDF token filtering