Dhar, Anirban and Paul, Mukul Chandra and Pal, Mrinmay and Mandal, Ashok Kumar and Sen, Suchitra and Maiti, Himadri Sekhar and Sen, Ranjan
  
(2006)
Characterization of porous core layer for controlling rare earth incorporation in optical fiber.
    Optics Express, 14 (20).
     9006  -9015.
     ISSN 1094-4087 
  
  
  
  
  
    
  
    
      
      
    
  
  
  
    Abstract
    The porous core layer deposited by modified chemical vapour deposition process has been analyzed in terms of thickness, pore size distribution, homogeneity and characteristics of the soot particles to investigate their variation with deposition temperature and input vapour composition. The compositions selected were SiO2, SiO2-GeO2 and SiO2-P2O5. Rare earth ions were incorporated into the deposit by a solution doping technique. The analysis of deposited microstructures was found to provide a quantitative indication about the rare earth incorporation and its variation with respect to process conditions. Thus the characterization provides a method of controlling rare earth doping and ultimate preform/fiber properties. (c) 2006 Optical Society of America 
  
  
  
  
  
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