Temperature strain double-parameter sensor based on few-mode hollow-core anti-resonance optical fiber

• Main Authors: XIAO YUEYU, HSU HSIN-YU
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2024
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

The invention discloses a temperature and strain dual-parameter sensor based on a few-mode hollow-core anti-resonance optical fiber, and belongs to the technical field of optical fiber sensing. The optical fiber sensor is composed of an input single-mode optical fiber, an output single-mode optical fiber, a few-mode hollow-core anti-resonance sensing optical fiber and spectrum monitoring processing equipment. The sensor capable of realizing temperature and strain dual-parameter detection is designed by using two mechanisms of resonant coupling and few-mode interference. The sensor has the advantages that the two-parameter sensing of the optical fiber is realized by utilizing a section of few-mode hollow-core anti-resonance optical fiber, the temperature and strain sensing sensitivity is high, the sensor structure is simple, and the post-processing technical requirement is low; two sensing mechanisms are realized by one section of optical fiber, and the demodulation difficulty is low. 本发明公开一种基于少模空芯反谐振光纤的温度和应变双