公开(公告)号：US20230305224A1

公开(公告)日：2023-09-28

申请号：US18185685

申请日：2023-03-17

Applicant: Sterlite Technologies Limited

Inventor： Saurabh Kapoor ,  Ranjith Balakrishnan ,  Anand Pandey

IPC: G02B6/036 ,  G02B6/02

CPC classification number: G02B6/03694 ,  G02B6/02042 ,  G02B6/02338

Abstract: The present invention relates to an optical fiber (100, 200, 300, 400) comprising one or more cores (102), a clad enveloping the one or more cores and a buffer clad layer (202, 302, 402) between the first clad layer and the second clad layer. Particularly, the clad includes a first clad layer (104) is made of silica with less than 0.1% metallic impurity and a second clad layer (106) is made of silica with greater than 0.1% of metallic impurity. Further, the first clad layer has less than 800 ppm OH content, less than 10 ppm aluminium and less than 2 ppm sodium and the second clad layer has less than 50 ppm OH content, more than 10 ppm aluminium and more than 2 ppm sodium.

公开(公告)号：US20210047225A1

公开(公告)日：2021-02-18

申请号：US16849966

申请日：2020-04-15

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Saurabh Kapoor ,  Badri Gomatam

IPC: C03B37/012

Abstract: The present disclosure provides a method for manufacturing of an optical fiber preform. The method includes a first step of compacting silica particles using a pressing die and punching machine. The silica particles are loaded into a cavity of the pressing die surrounding a cylindrical rod. The silica particles are compacted to form compact object with a predefined shape. The method includes another step of sintering the compacted object with the cylindrical rod to form the optical fiber preform. The sintering of the compact object is performed in a gaseous environment. The method facilitates the manufacturing of the optical fiber preform that is cone free for the reduction of material loss during manufacturing of the optical fiber preform.

公开(公告)号：US20240280745A1

公开(公告)日：2024-08-22

申请号：US18340869

申请日：2023-06-25

Applicant: Sterlite Technologies Limited

Inventor： Apeksha Malviya ,  Srinivas Reddy Munige ,  Saurabh Kapoor ,  Anand Pandey

IPC: G02B6/036 ,  G02B6/02 ,  G02B6/44

CPC classification number: G02B6/03694 ,  G02B6/02042 ,  G02B6/4403

Abstract: The present invention relates to a multi-core optical fiber having a plurality of cores (102) and a cladding (108) surrounding the plurality of cores (102). The cladding (108) has a peripheral cladding layer (108b) that is down doped such that a leakage loss of the multi-core optical fiber (100) is less than 0.001 Decibel/Kilometer (dB/Km) at a wavelength 1550 nanometers (nm).