Integrated Microfibre Device for Refractive Index and Temperature Sensing

Sensors

Kok-Sing Lim²  Iman Aryanfar¹  Wu-Yi Chong²  Yew-Ken Cheong²  Sulaiman W. Harun² 

[1] Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia; E-Mail:;Photonics Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia; E-Mails:

关键词: microfibre;    microfibre resonator;    sensor;    integrated devices;   

DOI  :  10.3390/s120911782

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.