Envelope-based technique for liquid level sensors using an in-line fiber Mach-Zehnder interferometer

This paper proposes a sensor interrogation technique based on the analysis of the overall spectrum envelope of an in-line Mach-Zehnder interferometer structure with three different fibers. The interference pattern created by a level sensor of 120 mm was evaluated with both the traditional and the pr...

Full description

Saved in:
Bibliographic Details
Published in:Applied optics (2004) 2016-12, Vol.55 (34), p.9803-9809
Main Authors: Rodríguez, Camilo A, Ribeiro, Moisés R N, Frizera-Neto, Anselmo, Castellani, Carlos E S, Pontes, Maria José
Format: Article
Language:English
Subjects:
Fibers
Interference
Interrogation
Linearity
Liquid levels
Mach-Zehnder interferometers
Sensitivity
Sensors
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper proposes a sensor interrogation technique based on the analysis of the overall spectrum envelope of an in-line Mach-Zehnder interferometer structure with three different fibers. The interference pattern created by a level sensor of 120 mm was evaluated with both the traditional and the proposed interrogation techniques. The result shows that the technique here proposed improves the sensitivity of the sensor by more than an order of magnitude. Moreover, our new interrogation technique allows the length of an in-line Mach-Zehnder interferometer to be extended up to 470 mm while maintaining high linearity and sensitivity.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.55.009803