Temperature sensor based on twin hole optical fiber

US11781923B1 · kind B1 · utility

Assignee

• Xinjiang Technical Institute of Physics and Chemistry, CAS · CN

Inventors

• Linjun Li · Ürümqi, CN
• Yuqiang Yang · Zhanjiang, CN
• Shilie Pan · Ürümqi, CN
• Yu Zhou · Ürümqi, CN
• Xiaoming Duan · Nanhu, CN
• Yingjie Shen · Ürümqi, CN
• Qianqian Hao · Ürümqi, CN
• Xin He · Greenville, US

Key dates

• Filing date: May 31, 2023
• Grant date: Oct 10, 2023
• Expiry date: May 31, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01K11/3206
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A fiber optic sensing head includes a single-mode optical fiber, a twin hole optical fiber including a cladding region and a core region surrounded by the cladding region, and the core region includes a second core located at an axis center, as well as a first and second round holes symmetrically distributed with respect to the second core; an incoming end of a gradient refractive-index fiber is connected to an outgoing end of the twin hole optical fiber with the incoming end of the gradient index fiber aligned with the outgoing end of the single-mode optical fiber at center. A thermal-sensitive structure is filled in a preset length part of the second round hole extending along an axial direction of the twin hole optical fiber. An incoming end of the twin hole optical fiber is connected to an outgoing end of the gradient index optical fiber with displacement.