公开(公告)号：US20210047224A1

公开(公告)日：2021-02-18

申请号：US16849848

申请日：2020-04-15

Applicant: Sterlite Technologies Limited

Inventor： Subhanshu Aggarwal ,  Chitra D ,  Janarthanan Balakrishnan ,  Hima Harode

IPC: C03B37/012

Abstract: The present disclosure provides a method for sintering of an optical fiber preform. The method includes preheating of the optical fiber preform in a sintering chamber. In addition, the method includes first downfeeding of the optical fiber preform into a sintering furnace in the presence of helium gas and chlorine gas. The first downfeeding of the optical fiber preform facilitates sintering of an outer layer of the optical fiber preform. Further, the method includes pulling out the optical fiber preform from the sintering furnace in presence of chlorine gas and at least one of nitrogen gas and helium gas. Further, the method includes second down feeding of the optical fiber preform in the sintering furnace in the presence of nitrogen gas and chlorine gas. The second downfeeding of the optical fiber preform facilitates sintering of the optical fiber preform.