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Title: Novel miniature pressure and temperature optical fibre sensor based on an extrinsic Fabry-Perot Interferometer (EFPI) and Fibre Bragg Gratings (FBG) for the ocean environment
Authors: Duraibabu, DineshBabu Babu 
Poeggel, Sven 
Omerdic, Edin 
Kalli, Kyriacos 
Capocci, Romano 
Lacraz, Amédéé 
Dooly, Gerard 
Lewis, Elfred 
Newe, Thomas 
Leen, Gabriel 
Toal, D. J F 
Keywords: FBG
Femtosecond laser
Pressure sensor
Issue Date: 1-Jan-2014
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: 13th IEEE SENSORS Conference, SENSORS 2014; Valencia Conference CentreValencia; Spain; 2 November 2014 through 5 November 2014
Abstract: A novel miniature sensor is proposed for accurate measurement of pressure (depth) and temperature changes in the ocean environment. The sensor is based on an optical fibre extrinsic Fabry Perot interferometer (EFPI) combined with a Fibre Bragg Grating (FBG). The EFPI provides pressure measurements while the Fibre Bragg Grating (FBG) provides temperature measurements. The FGB is post-inscribed into the EFPI using a femtosecond laser. The sensor is mechanically robust, corrosion resistant and suitable for use underwater. The combined pressure and temperature sensor system was mounted on-board a mini remotely operated underwater vehicle (ROV) in order to monitor the pressure changes at varying depths and compare with the reference pressure-depth sensor. The reflected optical spectrum of the sensor was monitored online and a pressure change caused a corresponding observable shift in the optical spectrum. The sensor exhibited excellent stability when measured over a 2 hour period underwater and its performance is compared with a commercially available reference sensor also mounted on the ROV. The comparison illustrates that the EFPI/FBG sensor is more accurate (∼0.025m) with a resolution of ∼0.005m, when compared to the reference sensor.
Rights: © 2014 IEEE.
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers

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