Recent Improvement of Medical Optical Fibre Pressure and Temperature Sensors

Biosensors

Sven Poeggel³  Dineshbabu Duraibabu³  Kyriacos Kalli¹  Gabriel Leen³  Gerard Dooly³  Elfed Lewis³  Jimmy Kelly²  Maria Munroe² 

[1] Nanophotonics Research Laboratory, Cyprus University of Technology, Lemesos 3036, Cyprus; E-Mail:;University of Limerick, Chemical & Environmental Science, Limerick MS1019, Ireland; E-Mails:;Optical Fibre Sensors Research Centre-University of Limerick, Limerick MS1019, Ireland; E-Mails:

关键词: optical fibre sensors;    Fabry–Perot interferometer;    pressure sensors;   

DOI  :  10.3390/bios5030432

来源: mdpi

【 摘 要 】

This investigation describes a detailed analysis of the fabrication and testing of optical fibre pressure and temperature sensors (OFPTS). The optical sensor of this research is based on an extrinsic Fabry–Perot interferometer (EFPI) with integrated fibre Bragg grating (FBG) for simultaneous pressure and temperature measurements. The sensor is fabricated exclusively in glass and with a small diameter of 0.2 mm, making it suitable for volume-restricted bio-medical applications. Diaphragm shrinking techniques based on polishing, hydrofluoric (HF) acid and femtosecond (FS) laser micro-machining are described and analysed. The presented sensors were examined carefully and demonstrated a pressure sensitivity in the range of= 0.1 K. Since the temperature sensing element is placed close to the pressure sensing element, the pressure sensor is insensitive to temperature changes.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.