Method for manufacturing an optical preform

Method for manufacturing an optical preform

  • CN 101,172,751 A
  • Filed: 09/10/2007
  • Published: 05/07/2008
  • Est. Priority Date: 09/08/2006
  • Status: Active Application
First Claim
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1. one kind by carrying out the method that one or more chemical vapour deposition reactions prepare optical precast product in parent tube, and this method may further comprise the steps:

  • I) provide one or more adulterated or unadulterated forming of glass precursors to described parent tube, andIi) in described parent tube, cause step I) in reaction between the reactant that provides, make to form one or more glass coatings, wherein step I i on the inside of described parent tube) comprise the pulse plasma district that only is created in the described parent tube inside,It is characterized in that;

    in the inner described plasma zone that forms of described parent tube be the frequency of employing>

    100Hz, effective maximum plasma power realizes with impulse form in the cycle of 0.001-5 millisecond A.

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