Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Solution doping method of making an optical amplifying fiber










Image Number 7 for United States Patent #6408652.

An optical amplifying fiber including a clad, a first core provided inside the clad and containing Ge, a second core provided inside the first core and containing Er and Al, and a third core provided inside the second core and containing Ge. The second core has a refractive index higher than that of the clad, and the first and third cores have refractive indexes each of which is higher than that of the second core. Since the third core having the high refractive index is provided at a central portion, it is possible to make smaller a mode field diameter and hence to improve a conversion efficiency of pumping light into signal light. Further, since the second core contains Al as an amplification band width increasing element, it is possible to sufficiently ensure a wide amplification band width.








 
 
  Recently Added Patents
Deceleration dependent shift control
Scoring users of network based users
Image processing apparatus, image forming system, and computer-readable storage medium
Frame timing synchronization in a geostationary satellite system
Device and method for processing input data of protective relay
Photomask blank, photomask blank manufacturing method, and photomask manufacturing method
Illumination apparatus for microlithography projection system including polarization-modulating optical element
  Randomly Featured Patents
Aminoalkyl-substituted thiazolin-2-ones, the preparation and use thereof
Packaging for plant food
Device for thermally treating substrates
Software component execution management using context objects for tracking externally-defined intrinsic properties of executing software components within an execution environment
PTFE reinforced compliant adhesive and method of fabricating same
Ignition timing control system for internal combustion engine
Data structure display system
Plastic system for injection molding and extruding a hollow tube for forming a plastic container by blowing
Lid handle
Method and arrangement relating to a telecommunication system