公开(公告)号：US20250004229A1

公开(公告)日：2025-01-02

申请号：US18747703

申请日：2024-06-19

Applicant: Sterlite Technologies Limited

Inventor： APEKSHA MALVIYA ,  PRIYA GUPTA ,  SRINIVAS REDDY MUNIGE ,  ANAND PANDEY

IPC: G02B6/44 ,  G02B6/028

Abstract: The present invention relates to an optical fiber (100) having a core region (102) and a cladding (104) defined by a relative refractive index profile (202). Particularly, the relative refractive index profile (202) varies from a center of the core region (102) to a periphery of the cladding (104). Moreover, the relative refractive index profile (202) has at least two low relative refractive index regions (208, 210) such that a relative refractive index at an interface (212, 218) of the at least two low relative refractive index regions (208, 210) is in a range between 0 and −0.1%.

公开(公告)号：US20250052948A1

公开(公告)日：2025-02-13

申请号：US18798735

申请日：2024-08-08

Applicant: Sterlite Technologies Limited

Inventor： APEKSHA MALVIYA ,  Harshika Digarse ,  Srinivas Munige ,  Anand Pandey

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

Abstract: The present invention relates to an optical fiber (100, 101, 103, 105, 107) having a core region (102) and a cladding region (104). In particular, the cladding region (104) has exactly one down-doped region (210, 310) and an undoped region (212, 312). The down doped region (210, 310) is a continuous region adjacent to core region (102) such that radial position of minimum relative refractive index (214, 314) of the optical fiber (100, 101, 103, 105, 107) is within 3 micrometers (μm) from interface between the down doped region (210, 310) and the undoped region (212, 312). Further, the mode field diameter of the optical fiber (100, 101, 103, 105, 107) is in range of 8.8 μm to 9.6 μm at a wavelength 1310 nanometres (nm), and cable cut-off of the optical fiber (100, 101, 103, 105, 107) is less than or equal to 1260 nm.

公开(公告)号：US20250004194A1

公开(公告)日：2025-01-02

申请号：US18755215

申请日：2024-06-26

Applicant: Sterlite Technologies Limited

Inventor： APEKSHA MALVIYA ,  JANARTHANAN BALAKRISHNAN ,  PRIYA REDDY GUPTA ,  SHUBHAM KUMAR ,  SRINIVAS REDDY MUNIGE ,  ANAND PANDEY

IPC: G02B6/028 ,  G02B6/02 ,  G02B6/036 ,  G02B6/44

Abstract: The present invention relates to an optical fiber 100 having a core (102) which is up doped and a cladding (104) surrounding the core (102). Particularly, the cladding (104) has a first cladding (104a) defined by a first relative refractive index difference (Δ1). Moreover, the first cladding (104a) is a continuous region adjacent to the core (102) such that a relative refractive index profile of the first cladding (104a) is an alpha profile. Further, the optical fiber (100) has mode field diameter in the range of 8.2 micrometer (μm) to 9.0 μm at a wavelength of 1310 nanometer (nm), and a cut-off wavelength less than or equal to 1260 nm.

公开(公告)号：US20240210616A1

公开(公告)日：2024-06-27

申请号：US18340848

申请日：2023-06-24

Applicant: Sterlite Technologies Limited

Inventor： APEKSHA MALVIYA ,  RANJITH BALAKRISHNAN ,  SRINIVAS REDDY MUNIGE ,  ANAND PANDEY

IPC: G02B6/02

CPC classification number: G02B6/02395 ,  G02B6/02009 ,  C03C25/1065

Abstract: The present invention relates to an optical fiber (100, 120, 142) comprising a silica region (102, 122, 144), a first coating (104, 124, 146), and a second coating (106, 126, 148). The first coating (104, 124, 146) is adapted to cover an outer circumference of the silica region (102, 122, 144). The second coating (106, 126, 148) adapted to cover an outer surface of the first coating (104, 124, 146). Moreover, the first coating (104, 124, 146) and the second coating (106, 126, 148) are adapted to cause a coating induced micro bend loss that is less than 2.2×103 N−1 mm−8.5.