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             Fiber 
              Geometries 
            CHI's 
              standard fiber is circular in cross-section. We can also produce 
              square and hexagonal fiber preform cross-sections, and our in-house 
              glass shop can create even more complicated geometries. Preforms, 
              both for single and multi-fiber structures, generally retain their 
              geometry during the draw process.  
              
            
              
            
              
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