公开(公告)号：US20240418931A1

公开(公告)日：2024-12-19

申请号：US18709269

申请日：2023-01-04

Applicant: SHANGHAI UNIVERSITY

Inventor： Wei CHEN ,  Fufei PANG ,  Tinyun WANG ,  Sujuan HUANG ,  Xiaobei ZHANG ,  Jianxiang WEN ,  Yanhua DONG ,  Yi HUANG ,  Ying ZHANG ,  Yang WANG

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

Abstract: A bending-resistant low-crosstalk photonic orbital angular momentum (OAM) optical fiber waveguide. An optical fiber sequentially comprises, from the center to the outside, a first core layer (1), a second core layer (2), a first cladding layer (3), a second cladding layer (4), and a third cladding layer (5), wherein the third cladding layer (5) is the thickest, the first core layer (1) is the second thickest, and the first cladding layer (3) is the thinnest; the refractive index of the first cladding layer (3) is the lowest, the refractive index of the second cladding layer (4) is the second lowest, and the refractive index of the second core layer (2) is the highest. The waveguide structure can effectively regulate the output of different OAM modes, and an effective refractive index difference between modes is greater than 2×10−4, the modes are easy to separate, and multiplexing and demultiplexing are facilitated.

公开(公告)号：US20230280535A1

公开(公告)日：2023-09-07

申请号：US18114824

申请日：2023-02-27

Applicant: Shanghai University

Inventor： Tingyun WANG ,  Chuanlu DENG ,  Yi HUANG ,  Xiaobei ZHANG

IPC: G02B6/27

CPC classification number: G02B6/272 ,  G02B6/2773

Abstract: Disclosed is an optical waveguide multi-cascaded coupling mode division multiplexer. The optical waveguide multi-cascaded coupling mode division multiplexer comprises an optical waveguide layer and a substrate layer, wherein the optical waveguide layer comprises a first optical waveguide and a second optical waveguide; the second optical waveguide comprises a transmission optical waveguide and a plurality of coupling structures; each coupling structure comprises a coupling optical waveguide and a connecting optical waveguide; the coupling optical waveguide and the transmission optical waveguide are connected through the connecting optical waveguide; the coupling optical waveguide is parallel to the transmission optical waveguide; and the distance between the coupling optical waveguide and the first optical waveguide is smaller than that between the transmission optical waveguide and the first optical waveguide.

公开(公告)号：US20240319434A1

公开(公告)日：2024-09-26

申请号：US18439137

申请日：2024-02-12

Applicant: Shanghai University

Inventor： Tingyun WANG ,  Jianxiang WEN ,  Yanhua DONG ,  Xiaobei ZHANG ,  Yi HUANG ,  Weiqi WANG

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

CPC classification number: G02B6/02042 ,  G02B6/02342 ,  G02B6/028 ,  G02B6/03688

Abstract: An optical fiber with wide bandwidth and high gain in an O+E band and a regulation method thereof are disclosed. The optical fiber includes a core and a cladding (0). The core includes a first loose layer (1), a first core layer (2), a second loose layer (3), a second core layer (4) and an inner core (5) from outside to inside. The first loose layer (1) and the second loose layer (3) are made of a silica material doped with high-refractive-index GeO2 and P2O5. In the first core layer (2) and the second core layer (4), Al2O3, bismuth oxide and PbO are sequentially doped. The gain performance of the optical fiber is controlled by adjusting doping molar ratios of Al2O3, bismuth oxide and PbO. The co-doped silica optical fiber maintains fiber gains exceeding 15 dB in a wavelength range of 1260 to 1460 nm.

公开(公告)号：US20210072641A1

公开(公告)日：2021-03-11

申请号：US17014714

申请日：2020-09-08

Applicant: Shanghai University

Inventor： Tingyun WANG ,  Chuanlu DENG ,  Xueting WANG ,  Yi HUANG ,  Xiaobei ZHANG

IPC: G03F7/00 ,  G02B6/13 ,  G03F7/20 ,  G03F1/38 ,  G03F7/16

Abstract: Disclosed is a method for fabricating a spherical concave mirror in an optical waveguide based on ultraviolet (UV) grayscale lithography. A key component is a specially designed mask pattern composed of a rectangle as well as a semicircle adjacent to the rectangle, where a rectangular area has no grayscale distribution, and UV light penetrating through different portions of the rectangular area has the same intensity; a semicircular area has the grayscale distribution, and the UV light penetrating through the semicircular area with the grayscale distribution is changed in intensity from the center of a circle in the radius direction according to a special function distribution law; an interlayer photoresist in the rectangular area is irradiated by the UV light penetrating through a mask plate and is developed to form an optical waveguide core.