Year: 2025
Type: article
Abstract: A novel optical fiber sensor, based on a composed-type Sagnac loop for gas pressure sensing, has been introduced and experimentally validated. This sensor consists of a centimeter-scale twin-hole and dual-core fiber (THDCF) sandwiched by two segments of polarization-maintaining fibers (PMFs) via splicing. Given that the pure quartz PMF is insensitive to the variations in gas pressure, it is unsuitable for gas pressure sensing. To improve the sensitivity, a short piece of THDCF is added to the PMF-based Sagnac loop. Theoretical analysis has demonstrated that the presence of THDCF could significantly amplify the impact of air pressure on birefringence. Experimental results reveal that as the ambient gas pressure rises from 0 to 1.2 MPa, the interference spectrum exhibits an obvious red shift with a high sensitivity of 8.381 nm/MPa. The sensor’s reliability has undergone repeated verification by increasing and decreasing the pressure. Attributed to its simple structure, easy fabrication, low cost, and high sensitivity, the proposed sensor is particularly suited for development in harsh environments.
Source: Photonics
Authors: Lingyu Wang, Yang Li, Rujun Zhou, Qiang Ling, Zhangwei Yu, Zuguang Guan, Daru Chen
Institutions: Zhejiang Normal University, Hangzhou Normal University
Language: English
Topic: Advanced Fiber Optic Sensors
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,896
Award: 基于光纤光栅的高温型氢气传感机理及传感器研究
OpenAlex ID: W4416846035