TH15601A - Methods for the manufacture of optical fiber pre-formed sections - Google Patents

Abstract

This unique approach allows the production of high-quality porous preforms without slits. Or cracks, however, it was possible to obtain high-quality optical fiber pre-formed parts without air bubbles at all.

Claims (3)

1. Method for producing the optical fiber pre-formed part that consists of the process of The insertion of a silica-based spherical rod in the master cavity. This is followed by loading the compression material into the cavity and applying pressure to the template from the outside to create a porous layer on the surface of the round bar. And therefore the preparation for forming porosity Where at least one end of this round bar Will protrude outside the compression cavity of the pattern at the end of the pressure of the template. Mechanical removal of the perforated part from the template by applying pressure to the humid end of the round section and by applying pressure to one end of the round bar section. While tensioning the other end of the round bar in the process of removing the perforated part from the template. 2. The method of producing the optical fiber pre-formed part as in claim 1, where the rod section is examined at the end, where the diameter of the spherical section is smaller along the end surface. Of that, and this round stick braced with that template in this smaller area of that thing 3. The method of manufacturing the optical fiber pre-formed part consists of the process of The insertion of a silica-based spherical rod in the master cavity. Followed by the filling of compressed materials into such compression cavities. Applying pressure to the template from the outside to create a porous layer on the surface of the round bar section. And therefore the preparation for forming porosity At least one end of the rod protrudes outside the compression cavity in the process of the pressure of the template. Fixing supports with a larger diameter A section of a round bar with at least one end of a round bar segment Different supports and round bars have respective cross-sectional areas, and the arrangement of P-type compression pressure in the pressure step is according to the formula (I) given below. P / (A / B) <400 (I) where A is the cross-sectional area of the core material and B is the cross-sectional area of the support.