Resources Contact Us Home
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
Quantitative sleep analysis system and method
Wafer level package and fabrication method
Magnetic resonance imaging apparatus
Display stand for a mobile tablet computer
Techniques for performing translation of messages
System and method for the heterologous expression of polyketide synthase gene clusters
Blur correction device and imaging apparatus
  Randomly Featured Patents
Ink-jet media coatings including expoxy-functionalized inorganic particulates and amine-functionalized inorganic particulates
Spline shaft connection
Steromicroscope having stabilizer for preventing tipping of eyepiece assemblies
Method for modulating GPR119 G protein-coupled receptor and selected compounds
Car seat cover
Method and device for determining the quality of a specific lubricant for application in rolling bearings of a specific type
Motor vehicle body protection apparatus and method of making
Magnetic recording medium
Battery pack with an improved cooling structure
Grasscatcher bag fabric