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.