Optical fiber coil and production method therefor

Abstract

An optical fiber coil and a production method therefor reduce the likelihood of optical transmission loss due to stress or temperature changes at low cost. Plural single optical fibers are arranged in parallel and are integrally covered with a covering portion so as to form an optical fiber ribbon, and the optical fiber ribbon is wound into a coiled state.

1 . An optical fiber coil comprising: 
 an optical fiber ribbon formed by arranging in parallel plural single optical fibers and integrally covering the single optical fibers with a covering portion,    wherein the optical fiber ribbon is wound in a coiled state.    
   
   
       2 . An optical fiber coil according to  claim 1 , wherein the optical fiber ribbon is covered at a portion other than ends of the ribbon by the covering portion.  
   
   
       3 . An optical fiber coil according to  claim 2 , wherein the covering portion is made of silicone rubber.  
   
   
       4 . An optical fiber coil according to  claim 2 , wherein the covering portion is made of at least one of flame resistant silicone rubber and chloroprene rubber.  
   
   
       5 . A production method for an optical fiber coil, comprising: 
 arranging in parallel plural single optical fibers;    integrally covering the single optical fibers with a covering portion to form an optical fiber ribbon; and    winding the optical fiber ribbon into a coiled state.    
   
   
       6 . A production method for an optical fiber coil, comprising: 
 arranging in parallel plural single optical fibers;    integrally covering the single optical fibers with a covering portion to form an optical fiber ribbon;    winding the optical fiber ribbon into a coiled state to form an optical fiber coil; and    forming a covering portion that covers the optical fiber coil at a portion other than at ends of the ribbon.