公开(公告)号：US20240353613A1

公开(公告)日：2024-10-24

申请号：US18688306

申请日：2022-08-29

申请人： OFS Fitel, LLC

发明人： Tristan Kremp ,  Jie Li ,  Jiawei Luo ,  Andrei A Stolov

IPC分类号： G02B6/028 ,  C03C3/06 ,  C03C13/04 ,  G02B6/036

CPC分类号： G02B6/0288 ,  C03C3/06 ,  C03C13/046 ,  C03C2201/31 ,  C03C2213/00 ,  G02B6/036

摘要： A hydrogen diffusion barrier is included as an intra-cladding layer (i.e., a “ring”) within an optical fiber structure. The hydrogen diffusion barrier ring may comprise alumina (or other glass oxides) and is positioned within the fiber cladding at an optimum location with respect to the central core region of the optical fiber. The thickness of the barrier ring may be controlled by fabrication processes to control properties such as hydrogen permeability. Other alkali and alkaline earth metal oxides may be included in the composition of the barrier ring and are useful in preventing crystal formation during the fiber fabrication process.

公开(公告)号：US12072526B2

公开(公告)日：2024-08-27

申请号：US18327503

申请日：2023-06-01

申请人： FURUKAWA ELECTRIC CO., LTD.

发明人： Kazunori Mukasa

IPC分类号： G02B6/02 ,  G02B6/036

CPC分类号： G02B6/03633 ,  G02B6/02 ,  G02B6/02004 ,  G02B6/036 ,  G02B6/0365 ,  G02B6/02214

摘要： An optical fiber includes: a core portion made of glass; and a cladding portion made of glass, having a refractive index lower than the refractive index of the core portion, and positioned on an outer periphery of the core portion. Further, the cladding portion has an outer diameter smaller than 100 μm, and the core portion has a relative refractive-index difference of 0.32% to 0.40% with respect to the cladding portion.

公开(公告)号：US20240264367A1

公开(公告)日：2024-08-08

申请号：US18340867

申请日：2023-06-25

申请人： Sterlite Technologies Limited

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

IPC分类号： G02B6/036

CPC分类号： G02B6/0365

摘要： 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.

公开(公告)号：US11982836B2

公开(公告)日：2024-05-14

申请号：US17906075

申请日：2021-03-23

申请人： Soreq Nuclear Research Center

发明人： Bruno Sfez ,  Yoav Sintov ,  Shaul Pearl

IPC分类号： G02B6/036 ,  G02B6/02

CPC分类号： G02B6/02395 ,  G02B6/02038 ,  G02B6/03694

摘要： An optical fiber heating device includes a heat producing fiber wrapped around a cell which is filled with an atom vapor.

公开(公告)号：US20240139866A1

公开(公告)日：2024-05-02

申请号：US18387089

申请日：2023-11-06

申请人： TRUMPF Laser- und Systemtechnik GmbH

发明人： Rudolph Huber ,  Wolfgang Andreasch ,  Martin Huonker

IPC分类号： B23K26/064 ,  B23K26/067 ,  B23K26/073 ,  G02B6/02 ,  G02B6/036 ,  G02B6/26 ,  G02B6/35 ,  G02B6/42

CPC分类号： B23K26/064 ,  B23K26/067 ,  B23K26/073 ,  G02B6/02042 ,  G02B6/03644 ,  G02B6/262 ,  G02B6/35 ,  G02B6/3508 ,  G02B6/4206 ,  G02B6/4296 ,  B23K2103/06

摘要： Methods and systems for generating a laser beam with different beam profile characteristics are provided. In one aspect, a method includes coupling an input laser beam into one fiber end of a multi-clad fiber, in particular a double-clad fiber and emitting an output laser beam from the other fiber end of the multi-clad fiber. To generate different beam profile characteristics of the output laser beam, the input laser beam is electively coupled either at least into the inner fiber core of the multi-clad fiber or at least into at least one outer ring core of the multi-clad fiber, or a first sub-beam of the input laser beam is coupled into at least into the inner fiber core of the multi-clad fiber and a second, different sub-beam of the input laser beam is coupled at least into the at least one outer ring core of the multi-clad fiber.

公开(公告)号：US11971572B2

公开(公告)日：2024-04-30

申请号：US17674905

申请日：2022-02-18

申请人： GlobalFoundries U.S. Inc.

发明人： Shesh Mani Pandey ,  Yusheng Bian ,  Francis O. Afzal

IPC分类号： G02B6/036 ,  G02B6/028

CPC分类号： G02B6/0288 ,  G02B6/036

摘要： Disclosed is an optical waveguide including a waveguide core and waveguide cladding surrounding the waveguide core. The waveguide cladding includes at least one stack of cladding material layers positioned laterally adjacent to a sidewall of the waveguide core such that each cladding material layer in the stack abuts the sidewall of the waveguide core. Each of the cladding material layers in the stack has a smaller refractive index than the waveguide core and at least two of the cladding material layers in the stack have different refractive indices, thereby tailoring field confinement and reshaping the optical mode. Different embodiments include different numbers of cladding material layers in the stack, different stacking orders of the cladding material layers, different waveguide core types, symmetric or asymmetric cladding structures on opposite sides of the waveguide core, etc. Also disclosed is a method of forming the optical waveguide.

公开(公告)号：US20240069273A1

公开(公告)日：2024-02-29

申请号：US18261651

申请日：2021-12-16

申请人： SONY GROUP CORPORATION

发明人： HIROSHI MORITA ,  YUSUKE OYAMA ,  KAZUAKI TOBA ,  MASANARI YAMAMOTO

IPC分类号： G02B6/036 ,  H04B10/2513

CPC分类号： G02B6/03661 ,  H04B10/2513

摘要： To mitigate the accuracy of misalignment to reduce costs, and to suppress an inter-mode propagation delay difference to enable high-quality transmission of signals. An optical waveguide is configured to propagate only a fundamental mode at a first wavelength and propagate at least a first-order mode as well as the fundamental mode at a second wavelength. The optical waveguide is configured such that a refractive index distribution of a core and a cladding is controlled so that the inter-mode propagation delay difference is within a predetermined threshold, for example, the inter-mode propagation delay difference is zero, when communication is performed using light of the second wavelength. For example, the first wavelength is in a 1310-nm band and the second wavelength is in an 850-nm band.

公开(公告)号：US11916348B2

公开(公告)日：2024-02-27

申请号：US16943713

申请日：2020-07-30

申请人： Alessandro Corsi ,  Sophie La Rochelle ,  Junho Chang

发明人： Alessandro Corsi ,  Sophie La Rochelle ,  Junho Chang

IPC分类号： H01S3/067 ,  H01S3/16 ,  G02B6/02 ,  G02B6/036 ,  G02B6/024

CPC分类号： H01S3/06729 ,  H01S3/06712 ,  H01S3/06716 ,  H01S3/06754 ,  H01S3/1608 ,  G02B6/024 ,  G02B6/02285 ,  G02B6/03627

摘要： An optical fiber comprises a core having an elliptical cross section and a cladding having a circular cross section. The core has an aspect ratio between 2 and 40. The core and the cladding have a common central axis with the core being enclosed by the cladding. The difference of a refractive index of the cladding to a refractive index of the core is between 1×10−2 and 1.5×10−1. A trench is located between the core and the cladding. The trench has a uniform width and encircles the core. The refractive index of the trench is lower than the refractive index of the cladding.

公开(公告)号：US11899239B2

公开(公告)日：2024-02-13

申请号：US17930547

申请日：2022-09-08

申请人： FURUKAWA ELECTRIC CO., LTD.

发明人： Kazunori Mukasa ,  Shugo Takeuchi

IPC分类号： G02B6/036 ,  G02B6/02

CPC分类号： G02B6/0365 ,  G02B6/02214

摘要： An optical fiber includes: a central core portion; an intermediate layer configured to surround an outer periphery of the central core portion; a trench layer configured to surround an outer periphery of the intermediate layer; and a cladding portion configured to surround an outer periphery of the trench layer. The central core portion is made of silica based glass that does not contain germanium (Ge). Δ1>Δ2>Δ3 and ΔClad>Δ3, where Δ1 represents an average maximum relative refractive-index difference of the central core portion relative to pure quartz glass, Δ2 represents an average relative refractive-index difference of the intermediate layer relative to the pure quartz glass, Δ3 represents an average relative refractive-index difference of the trench layer relative to the pure quartz glass, and ΔClad represents an average relative refractive-index difference of the cladding portion relative to the pure quartz glass. Δ1 is equal to or larger than 0.05%.

公开(公告)号：US20240045138A1

公开(公告)日：2024-02-08

申请号：US18379476

申请日：2023-10-12

申请人： CORNING INCORPORATED

发明人： Scott Robertson Bickham ,  Sergejs Makovejs ,  Pushkar Tandon ,  Aramais Robert Zakharian

IPC分类号： G02B6/036 ,  G02B6/02

CPC分类号： G02B6/036 ,  G02B6/02009 ,  G02B6/02295

摘要： An optical fiber is provided that includes a core region and a cladding region. The core region is formed of silica glass doped with chlorine and/or an alkali metal. The cladding region surrounds the core region and includes an inner cladding directly adjacent to the core region, an outer cladding surrounding the inner cladding, and a trench region disposed between the inner cladding and the outer cladding in a radial direction. The trench region has a volume of about 30% Δ-micron2 or greater. Additionally, the optical fiber has an effective area at 1550 nm of about 100 micron2 or less.