Photodarkening-resistant ytterbium-doped quartz optical fiber and preparation method therefor

US11780768B2 · kind B2 · utility

Assignee

• Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences · CN

Inventors

• Lili HU · Shanghai, CN
• Fengguang Lou · Shanghai, CN
• Chunlei Yu · Changzhou City, CN
• Meng Wang · Shanghai, CN
• Lei Zhang · Nanhu, CN
• Xiaoqing XU · Lanzhou, CN
• Danping Chen · Ebetsu, JP
• Fan Wang · Shanghai, CN
• Mengting Guo · Shanghai, CN

Key dates

• Filing date: Jun 6, 2019
• Grant date: Oct 10, 2023
• Expiry date: Oct 4, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/176
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A photodarkening-resistant ytterbium-doped quartz optical fiber and a method for prpearing such a fiber are provided. Glass of a photodarkening-resistant ytterbium-doped quartz optical fiber core rod includes at least Yb2O3, Al2O3, P2O5, SiO2. The proportions of Yb2O3, Al2O3, and P2O5 in the entire substance are Yb2O3: 0.05-0.3 mol %, Al2O3: 1-3 mol %, and P2O5: 1-5 mol %, respectively. In the preparation method for the photodarkening-resistant ytterbium-doped quartz optical fiber, a sol-gel method and an improved chemical vapor deposition method are combined. By using the molecular-level doping uniformity and the low preparation loss thereof respectively, ytterbium ions, aluminum ions and phosphorus ions are effectively doped in a quartz matrix, thereby effectively solving the problems in the optical fiber of high loss, photodarkening caused by cluster or the like, and a central refractive index dip.