Towards the control of highly sensitive Fabry-Perot strain sensor based on hollow-core ring photonic crystal fiber

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Marta S Ferreira (Author) Other; Joerg Bierlich (Author) Other; Jens Kobelke (Author) Other; Kay Schuster (Author) Other; Jose L Santos (Author) FCUP; Orlando Frazao (Author) FCUP

Journal

Title: Optics Express

Vol. 20

Pages: 21946-21952

ISSN: 1094-4087

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 59 Citations

Scopus - 61 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-002-5D5

DOI: 10.1364/oe.20.021946

Abstract (EN): A high sensitivity Fabry-Perot (FP) strain sensor based on hollow-core ring photonic crystal fiber was investigated. A low-finesse FP cavity was fabricated by splicing a section of hollow-core ring photonic crystal fiber between two standard single mode fibers. The geometry presents a low cross section area of silica enabling to achieve high strain sensitivity. Strain measurements were performed by considering the FP cavity length in a range of 1000 mu m. The total length of the strain gauge at which strain was applied was also studied for a range of 900 mm. The FP cavity length variation highly influenced the strain sensitivity, and for a length of 13 mu m a sensitivity of 15.4 pm/mu epsilon was attained. Relatively to the strain gauge length, its dependence to strain sensitivity is low. Finally, the FP cavity presented residual temperature sensitivity (similar to 0.81 pm/degrees C). (C) 2012 Optical Society of America

Language: English

Type (Professor's evaluation): Scientific