Fabrication of optical preforms by axial chemical vapor deposition

  • US 4,440,558 A
  • Filed: 06/14/1982
  • Issued: 04/03/1984
  • Est. Priority Date: 06/14/1982
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of producing an optical preform, comprising the steps of forming a flow of a heated gaseous medium through and beyond a heating zone, including inducing a ring-shaped plasma in the heating zone for heating the gaseous medium to a predetermined temperature;

  • introducing only into the center of the ring-shaped plasma at least one reactant capable of undergoing a chemical conversion into an optical material soot at the predetermined temperature for the soot to be formed in, and entrained in the flow of the gaseous medium for travel beyond, the heating zone; and

    disposing a bait in the flow of the gaseous medium beyond the heating zone for depositing the entrained optical material soot on the bait and thus growing the optical preform.

View all claims

    Thank you for your feedback