Bending-resistant low-crosstalk photonic orbital angular momentum fiber waveguide

US12169302B1 · kind B1 · utility

Assignee

• SHANGHAI UNIVERSITY · CN

Inventors

• Wei Chen · Daguantang, CN
• Fufei PANG · Shanghai, CN
• Tinyun Wang · Shanghai, CN
• Sujuan Huang · Shanghai, CN
• Xiaobei ZHANG · Shanghai, CN
• Jianxiang WEN · Shanghai, CN
• Yanhua DONG · Shanghai, CN
• Yi-Ling Huang · Shanghai, CN
• Ying Zhang · Nanjing, CN
• Yang Wang · Suzhou, CN

Key dates

• Filing date: Jan 4, 2023
• Grant date: Dec 17, 2024
• Expiry date: Jan 4, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A30/00
• WIPO field: Optics
• WIPO sector: Instruments

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.