Patent ID: 8196437
Filing Date: 2012-06-12
Classification: C03B

Abstract:
1. A method of fabricating core rod sections useable for production of finished optical fiber preforms, comprising: inserting two or more core body pieces end-to-end axially inside a glass cylinder, thereby defining joints between adjacent ones of the inserted core body pieces; mounting the glass cylinder with the contained core body pieces vertically in a region of a furnace; heating the glass cylinder and core body pieces together in the furnace, thereby elongating the cylinder and the core body pieces contained in the cylinder; collapsing the elongated cylinder so as to form a finished core rod; and cutting the finished core rod at one or more positions along the length of the core rod that coincide with the joints between adjacent ones of the core body pieces, thereby yielding a number of core rod sections one or more of which are useable for the production of optical fiber preforms.