Temperature sensor based on partial dual-core special optical fiber and preparation method thereof

• Main Authors: WANG HUITING, JIN WA, FU XINGHU, WANG WENJING, BI WEIHONG, FU GUANGWEI, FU ZIZHEN
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2023
• Subjects: MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

The invention relates to a temperature sensor based on a partial dual-core special optical fiber and a preparation method thereof, and belongs to the technical field of optical fiber sensing. The temperature sensor comprises a single-mode optical fiber, a multi-mode optical fiber and a partial dual-core optical fiber; one end of the single-mode optical fiber is connected with one end of the multi-mode optical fiber, and the other end of the multi-mode optical fiber is connected with one end of the partial dual-core optical fiber; the partial dual-core optical fiber is composed of a first cylinder structure, a cone structure with the diameter gradually reduced and a second cylinder structure in sequence. And the end part of the second cylindrical structure is provided with a sphere structure which is prepared from the same optical fiber with the second cylindrical structure. According to the invention, one fiber core of the partial dual-core optical fiber is exposed by using the cone structure of which the dia