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Title: Femtosecond-Laser-Based Inscription Technique for Post-Fiber-Bragg Grating Inscription in an Extrinsic Fabry-Perot Interferometer Pressure Sensor
Authors: Poeggel, Sven 
Duraibabu, DineshBabu Babu 
Lacraz, Amédéé 
Kalli, Kyriacos 
Tosi, Daniele 
Leen, Gabriel 
Lewis, Elfred 
Keywords: Fabry Perot interferometer;Femtosecond laser;Fibre Bragg grating;OFPTS;Optical fibre sensor
Category: Electrical Engineering - Electronic Engineering - Information Engineering;Nano-Technology
Field: Engineering and Technology
Issue Date: 15-May-2016
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: IEEE Sensors Journal, 2016, vol 16, no. 10, pp. 3396-3402
Journal: IEEE Sensors Journal 
Abstract: In this paper, a novel fiber Bragg grating inscription technique based on a femtosecond laser is presented. The grating was inscribed in close proximity to the tip of an extrinsic Fabry-Perot interferometer (EFPI)-based optical fiber pressure sensor. This therefore represents an optical fiber pressure and temperature sensor (OFPTS) for simultaneous pressure and temperature measurement for use in exactly the same physical location. The temperature measurement can also be used to compensate thermal drift in the EFPI sensor. The Bragg wavelength can be tailored precisely to any given wavelength in the optical spectrum and the degree of reflection can be adjusted to suit the FPI spectrum. The OFPTS has a diameter of 200 $\mu \text{m}$ and is fully biocompatible. Furthermore, the sensor shows a high stability after grating inscription, of better than 0.5% in 20 min. The small size and high stability makes the sensor especially interesting for volume restricted areas, like blood vessels or the brain.
ISSN: 1530-437X
DOI: 10.1109/JSEN.2015.2434772
Collaboration : Cyprus University of Technology
University of Limerick
Nazarbayev University
Rights: © IEEE
Type: Article
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