Fabry-Perot cavities based on chemical etching for high temperature and strain measurement

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

Authors

Paula A R Tafulo (Author) Other; Jorge, PAS (Author) FCUP; Santos, JL (Author) FCUP; Frazao, O (Author) FCUP

Journal

Title: Optics Communications

Vol. 285

Pages: 1159-1162

ISSN: 0030-4018

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 36 Citations

Scopus - 41 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-002-C38

DOI: 10.1016/j.optcom.2011.11.097

Abstract (EN): In this paper, two hybrid multimode/single mode fiber Fabry-Perot (FP) cavities were compared. The cavities fabricated by chemical etching are presented as high temperature and strain sensors. In order to produce this FP cavity a single mode fiber was spliced to a graded index multimode fiber with 62.5 mu m core diameter. The Fabry-Perot cavities were tested as a high temperature sensor in the range between room temperature and 700 C and as strain sensors. A reversible shift of the interferometric peaks with temperature allowed to estimate a sensitivity of 0.75 +/- 0.03 pm/degrees C and 0.98 +/- 0.04 pm/degrees C for the sensor A and B respectively. For strain measurement sensor A demonstrated a sensitivity of 1.85 +/- 0.07 pm/mu and sensor B showed a sensitivity of 3.14 +/- 0.05 pm/mu. The sensors demonstrated the feasibility of low cost fiber optic sensors for high temperature and strain.

Language: English

Type (Professor's evaluation): Scientific