公开(公告)号：US20230314699A1

公开(公告)日：2023-10-05

申请号：US18176677

申请日：2023-03-01

Applicant: Sterlite Technologies Limited

Inventor： Amjad Khan ,  Chitra D ,  Abed Khan ,  Kailash Ekhande ,  E. Sudhakar Reddy

IPC: G02B6/036

CPC classification number: G02B6/03694 ,  G02B6/03638

Abstract: The present invention relates to an optical fiber having a core extending parallelly along a central axis of the optical fiber, an inner cladding surrounding the core and an outer cladding surrounding the inner cladding. In particular, the core is up-doped with first and second up-dopants and the inner cladding is up-doped with the second up-dopant. Moreover, the outer cladding is un-doped. Further, the optical fiber has an attenuation of less than 0.2 at a wavelength of 1625 nanometres (nm), the attenuation of less than 0.18 at a wavelength of 1550 nm, or the attenuation of less than 0.32 at a wavelength of 1310 nm and a cable cutoff in a range of 1186 nanometres (nm) to 1194 nm.

公开(公告)号：US20240264367A1

公开(公告)日：2024-08-08

申请号：US18340867

申请日：2023-06-25

Applicant: Sterlite Technologies Limited

Inventor： Amjad Khan ,  Chitra D. ,  Kailash Ekhande ,  E. Sudhakar Reddy

IPC: G02B6/036

CPC classification number: G02B6/0365

Abstract: The present invention relates to an optical fiber (100) with a core (102) extending along a central axis (112), a cladding (104) surrounding the core. The core comprises a first up-dopant and a second up-dopant. And, the cladding comprises a first cladding (106) surrounding the core, a second cladding (108) surrounding the first cladding, and a third cladding (110) surrounding the second cladding. The first cladding has a second up-dopant, the second cladding has down-dopant, and the third cladding is undoped. Further, the first cladding (106) has traces of the first up-dopant and the down-dopant, the second cladding (108) has traces of the second up-dopant, and the third cladding (110) has traces of the down-dopant.