Simultaneous measurement of refractive index and temperature using multimode interference inside a high birefringence fiber loop mirror

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Gouveia, C (Author) Other; Chesini, G (Author) Other; Cordeiro, CMB (Author) Other; Baptista, JM (Author) Other; Jorge, PAS (Author) FCUP

Journal

Title: Sensors and Actuators, B: Chemical

Vol. 177

Pages: 717-723

ISSN: 0925-4005

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 40 Citations

Scopus - 41 Citations

Other information

Authenticus ID: P-002-0M8

DOI: 10.1016/j.snb.2012.11.095

Abstract (EN): A fiber optic sensor for simultaneous measurement of refractive index and temperature is presented. The sensing probe is realized by introducing a multimode interference device inside a high birefringence fiber loop mirror resulting in a configuration capable of refractive index and temperature discrimination. The multimode interference peak is sensitive to the surrounding refractive index (90 nm/RIU) and slightly responsive to the temperature (0.01 nm/ degrees C). On the other hand, the birefringent fiber loop mirror is highly sensitive to temperature (2.36 nm/ degrees C) and it has almost no response to refractive index. Using a power ratiometric peak detection scheme, a temperature independent refractive index measurement can be achieved with a resolution of +/- 2.25 x 10(-5) RIU.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7