公开(公告)号：US12297116B2

公开(公告)日：2025-05-13

申请号：US16849951

申请日：2020-04-15

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Ranjith Balakrishnan ,  Badri Gomatam

IPC: B01J12/02 ,  B01J4/00 ,  C01B33/18 ,  C03B37/012

Abstract: The present disclosure provides a system for generating fumed silica particles for manufacturing of an optical fiber preform. The system includes a generator and a plurality of inlets connected with the generator. The generator includes a plurality of burners. The plurality of inlets include a first inlet, a second inlet, a third inlet and a fourth inlet. The first inlet provides passage for flow of a precursor material to the generator. The second inlet provides passage for flow of a first gas to the generator. The third inlet provides passage for flow of a second gas to the generator. The fourth inlet provides passage for flow of a carrier gas to the generator. The plurality of burners enables a chemical reaction between the precursor material, the first gas and the second gas that facilitates the generation of the fumed silica particles.

公开(公告)号：US20210047223A1

公开(公告)日：2021-02-18

申请号：US16993182

申请日：2020-08-13

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Badri Gomatam ,  Anand Pandey

IPC: C03B19/06 ,  C01B33/12 ,  C03C3/06

Abstract: The present disclosure provides a method for fabrication of a glass preform. The method includes production of soot particles in a combustion chamber using a precursor material. The heating of the precursor material produces the soot particles along with one or more impurities. In addition, the method includes agglomeration of the soot particles. Further, the method includes separation of the soot particles from the one or more impurities. Also, the separation of the soot particles is performed in a cyclone separator. Furthermore, the method includes collection of the soot particles. Also, the soot particles are compacted with facilitation of a preform compaction chamber. Also, the compacted preform is sintered with facilitation of a sintering furnace. The compaction of the soot particles followed by sintering results in formation of the glass preform.

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：US20210047190A1

公开(公告)日：2021-02-18

申请号：US16849951

申请日：2020-04-15

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Ranjith Balakrishnan ,  Badri Gomatam

IPC: C01B33/18 ,  B01J4/00 ,  B01J12/02

Abstract: The present disclosure provides a system for generating fumed silica particles for manufacturing of an optical fiber preform. The system includes a generator and a plurality of inlets connected with the generator. The generator includes a plurality of burners. The plurality of inlets include a first inlet, a second inlet, a third inlet and a fourth inlet. The first inlet provides passage for flow of a precursor material to the generator. The second inlet provides passage for flow of a first gas to the generator. The third inlet provides passage for flow of a second gas to the generator. The fourth inlet provides passage for flow of a carrier gas to the generator. The plurality of burners enables a chemical reaction between the precursor material, the first gas and the second gas that facilitates the generation of the fumed silica particles.

公开(公告)号：US11733459B2

公开(公告)日：2023-08-22

申请号：US16286556

申请日：2019-02-26

Applicant: Sterlite Technologies Limited

Inventor： Pramod Watekar ,  Annesha Maity ,  Manoj Mittal ,  Sandeep Gaikwad ,  Sham Nagarkar ,  Bhalchandra Pathak ,  Sathis Ram

IPC: C03B37/014 ,  G02B6/13 ,  G02B6/02 ,  C03B19/14 ,  C03B29/00 ,  C03C25/002 ,  C03C25/64 ,  G02B6/12

CPC classification number: G02B6/13 ,  C03B19/1453 ,  C03B29/00 ,  C03B37/01446 ,  C03C25/002 ,  C03C25/64 ,  G02B6/02052 ,  G02B6/02319 ,  G02B6/02342 ,  G02B2006/12197

Abstract: The present disclosure provides a method for modification of surface of an initial optical fiber preform. The initial optical fiber preform is manufactured using at least one preform manufacturing process. The surface of the initial optical fiber preform is treated with 50-70 liters of chlorine per square meter of the surface of the initial optical fiber preform. The surface of the initial optical fiber preform is flame polished using a flame polishing module. The treatment of the surface of the initial optical fiber preform with chlorine and flame polishing of the surface of the initial optical fiber preform collectively converts the initial optical fiber preform into a modified optical fiber preform.

公开(公告)号：US10955612B2

公开(公告)日：2021-03-23

申请号：US16286517

申请日：2019-02-26

Applicant: Sterlite Technologies Limited

Inventor： Pramod Watekar ,  Annesha Maity ,  Manoj Mittal ,  Sandeep Gaikwad ,  Sham Nagarkar ,  Bhalchandra Pathak ,  Sathis Ram

IPC: G02B6/00 ,  G02B6/036 ,  G01D5/353

Abstract: Embodiments describe an optical fiber that includes a core. The core has high compressive stress. The compressive stress of the core is in a range of about 20 to 60 MPa. The optical fiber further includes a cladding. The cladding is divided into a first cladding layer and a second cladding layer. The second cladding layer has a high residual stress. The high residual stress of the second cladding layer is in a range of about 20 to 60 MPa. The optical fiber enables reduction of particle related breaks. Further, the optical fiber has elevated LLT strength. The LLT strength is about 6 Kg. The optical fiber has high proof test yield. Furthermore, the optical fiber is highly sensitive to micro-bending of the optical fiber.

公开(公告)号：US20210047189A1

公开(公告)日：2021-02-18

申请号：US16849956

申请日：2020-04-15

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Shivi Dixit ,  Badri Gomatam

IPC: C01B33/18 ,  B01J8/18 ,  B01J8/00 ,  B01D45/16 ,  B04C5/02 ,  B04C5/20

Abstract: The present disclosure provides a separator system for performing separation and dehydroxylation of fumed silica particles. The separator system includes a first inlet, a second inlet, a main body, a first outlet and a second outlet. The first inlet collects a primary feed of fumed silica particles from a gaseous stream into a double entry cyclone. The second inlet collects a secondary feed of chlorine gas into the double entry cyclone. The main body of the double entry cyclone is utilized in treating the primary feed and the secondary feed along with heat inside the double entry cyclone. Furthermore, the first outlet is utilized for releasing the dehydrated fumed silica particles and the second outlet is utilized for releasing the water molecules and other gases.

公开(公告)号：US11912604B2

公开(公告)日：2024-02-27

申请号：US16993182

申请日：2020-08-13

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Badri Gomatam ,  Anand Pandey

IPC: C03B19/06 ,  C01B33/12 ,  C03C3/06 ,  C01B33/18

CPC classification number: C03B19/066 ,  C01B33/12 ,  C01B33/183 ,  C03B19/063 ,  C03C3/06 ,  C03B2201/03 ,  C03C2201/02

Abstract: The present disclosure provides a method for fabrication of a glass preform. The method includes production of soot particles in a combustion chamber using a precursor material. The heating of the precursor material produces the soot particles along with one or more impurities. In addition, the method includes agglomeration of the soot particles. Further, the method includes separation of the soot particles from the one or more impurities. Also, the separation of the soot particles is performed in a cyclone separator. Furthermore, the method includes collection of the soot particles. Also, the soot particles are compacted with facilitation of a preform compaction chamber. Also, the compacted preform is sintered with facilitation of a sintering furnace. The compaction of the soot particles followed by sintering results in formation of the glass preform.

公开(公告)号：US11236006B2

公开(公告)日：2022-02-01

申请号：US16993176

申请日：2020-08-13

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Badri Gomatam ,  Anand Pandey

IPC: C03B37/018

Abstract: The present disclosure provides a method for fabrication of an optical fibre soot preform. The method includes production of silicon dioxide particles along with waste particulates. The silicon dioxide particles are produced using a precursor material in a combustion chamber. In addition, the method includes cooling of the silicon dioxide particles. Further, the method includes agglomeration of the silicon dioxide particles. Furthermore, the method includes separation of the waste particulates from the silicon dioxide particles. Moreover, the method includes dehydration of the silicon dioxide particles. Also, the method includes compaction of the silicon dioxide particles. The compaction of the silicon dioxide particles facilitates fabrication of the optical fibre soot preform.

公开(公告)号：US20210047226A1

公开(公告)日：2021-02-18

申请号：US16993176

申请日：2020-08-13

Applicant: Sterlite Technologies Limited

Inventor： Sandeep Gaikwad ,  Badri Gomatam ,  Anand Pandey

IPC: C03B37/018

Abstract: The present disclosure provides a method for fabrication of an optical fibre soot preform. The method includes production of silicon dioxide particles along with waste particulates. The silicon dioxide particles are produced using a precursor material in a combustion chamber. In addition, the method includes cooling of the silicon dioxide particles. Further, the method includes agglomeration of the silicon dioxide particles. Furthermore, the method includes separation of the waste particulates from the silicon dioxide particles. Moreover, the method includes dehydration of the silicon dioxide particles. Also, the method includes compaction of the silicon dioxide particles. The compaction of the silicon dioxide particles facilitates fabrication of the optical fibre soot preform.