Integrated Microfibre Device for Refractive Index and Temperature Sensing
Document Type
Article
Publication Date
1-1-2012
Abstract
A microfibre device integrating a microfibre knot resonator in a Sagnac loop reflector is proposed for refractive index and temperature sensing. The reflective configuration of this optical structure offers the advantages of simple fabrication and ease of sensing. To achieve a balance between responsiveness and robustness, the entire microfibre structure is embedded in low index Teflon, except for the 0.5-2 mm diameter microfibre knot resonator sensing region. The proposed sensor has exhibited a linear spectral response with temperature and refractive index. A small change in free spectral range is observed when the microfibre device experiences a large refractive index change in the surrounding medium. The change is found to be in agreement with calculated results based on dispersion relationships.
Keywords
Integrated devices, Microfibre, Microfibre resonator, Sensor
Divisions
fac_eng,PHYSICS
Publication Title
Sensors
Volume
12
Issue
9
Publisher
MDPI