Colossal Enhancement of Strain Sensitivity Using the Push-Pull Deformation Method

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Paulo Robalinho (Author) Other; André Gomes (Author) Other; Orlando Frazão (Author) FEUP

Journal

Title: IEEE Sensors Journal

Vol. 21 No. 4

Pages: 4623-4627

ISSN: 1530-437X

Publisher: IEEE

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 0 Citations

Other information

Authenticus ID: P-00S-XJ0

DOI: 10.1109/jsen.2020.3033581

Abstract (EN): In this work, a colossal enhancement of strain sensitivities through the push-pull deformation method in interferometry is reported for the first time. For the demonstration of the new method, two cascaded interferometers in a fiber loop mirror are used. Usually, strain is applied at the fiber end of the interferometers. In this work, we propose applying strain at the middle of the two cascaded interferometers whereas the fiber ends of the sensor are fixed. Strain is then applied in the fusion region between the two-cascaded interferometers in a push-pull configuration, thus ensuring simultaneously the extension of one interferometer and the compression of the other. Although the carrier signal is maintained constant, the proposed technique induces a colossal enhancement of sensitivity in the envelope signal. Strain sensitivities up to 10000 pm/ $\mu \varepsilon $ are achieved.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5