Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/9510
Title: | Recent improvement of medical optical fibre pressure and temperature sensors | Authors: | Poeggel, Sven Duraibabu, Dineshbabu Kalli, Kyriacos Leen, Gabriel Dooly, Gerard Lewis, Elfed Kelly, Jimmy Munroe, Maria |
Major Field of Science: | Engineering and Technology | Field Category: | Electrical Engineering - Electronic Engineering - Information Engineering | Keywords: | Fabry–Perot interferometer;Optical fibre sensors;Pressure sensors | Issue Date: | 13-Jul-2015 | Source: | Biosensors, 2015, vol. 5, no. 3, pp. 432-449 | Volume: | 5 | Issue: | 3 | Start page: | 432 | End page: | 449 | DOI: | 10.3390/bios5030432 | Journal: | Biosensors | Abstract: | 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 sp = 2-10 nm/kPa and a resolution of better than ΔP = 10 Pa (0.1 cm H2O). A static pressure test in 38 cm H2O shows no drift of the sensor in a six-day period. Additionally, a dynamic pressure analysis demonstrated that the OFPTS never exceeded a drift of more than 130 Pa (1.3 cm H2O) in a 12-h measurement, carried out in a cardiovascular simulator. The temperature sensitivity is given by k = 10:7 pm/K, which results in a temperature resolution of better than ΔT = 0.1 K. Since the temperature sensing element is placed close to the pressure sensing element, the pressure sensor is insensitive to temperature changes. | URI: | https://hdl.handle.net/20.500.14279/9510 | ISSN: | 0265928X | DOI: | 10.3390/bios5030432 | Rights: | © MDPI AG | Type: | Article | Affiliation : | University of Limerick Cyprus University of Technology |
Appears in Collections: | Άρθρα/Articles |
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