학술논문
Vernier Effect in a Compact Strain Sensor Based on Fiber Loop Mirrors Using a 3 × 3 Coupler
Document Type
Periodical
Author
Source
IEEE Photonics Technology Letters IEEE Photon. Technol. Lett. Photonics Technology Letters, IEEE. 35(16):870-873 Aug, 2023
Subject
Language
ISSN
1041-1135
1941-0174
1941-0174
Abstract
In this letter, a new configuration based on two fiber loop mirrors in series using a $3\times 3$ coupler is demonstrated. This configuration is compact and can explore the Vernier effect. The results obtained were a sensitivity of 74.9 $\pm 0.2~pm/\mu \varepsilon $ for the Vernier envelope and 6.41 $\pm 0.01~pm/\mu \varepsilon $ for the Vernier carrier. These results were compared to the sensitivity of the setup using only one fiber loop mirror interferometer, obtaining 14.41 $\pm 0.01~pm/\mu \varepsilon $ . This means a magnification factor of 5.2 for the Vernier envelope. Theoretical treatment of the system was carried out, using Jones matrix calculus, and the subsequent simulation results are also presented, having obtained good agreement with the experimental data.