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Process for the preparation of glass fiber optical waveguides with increased tensile strength

  • US 5,242,476 A
  • Filed: 09/05/1992
  • Issued: 09/07/1993
  • Est. Priority Date: 09/06/1990
  • Status: Expired due to Fees
First Claim
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1. A process for preparing a glass fiber optical waveguide with increased tensile strength comprising the steps of:

  • A. providing a glass preform with a core and an outermost sheathing layer of a glass material, the glass material of the outermost layer has a lower coefficient of thermal expansion as compared with material underneath the outermost layer;

    B. heating at least a portion of the glass preform to a temperature close to a melting temperature of the glass material; and

    C. drawing a glass fiber optical waveguide from the heated portion of the preform using an increased tensile force in the range of 70 to 200 cN.

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