Abstract
A compact Omega shaped long-period fiber grating (OS-LPFG) for vector bending measurement is proposed and investigated in this paper. This sensor is fabricated by periodically splicing single-mode fiber (SMF) and multi-mode fiber (MMF) into Omega shape to get the purpose of sensitivity enhancing. The proposed OS-LPFG can distinguish the bending direction and achieves the curvature sensitivities in X, Y, -X directions are 12.03 nm/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> , –69.95 nm/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> and –19.84 nm/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> at the range of 0 m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> to 1.5 m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> . Meanwhile, the sensor has a small temperature crosstalk of 0.0011 m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> /°C at the temperature range of 20 °C to 110 °C. In addition, the sensor features a compact structure with the length of 1.5 mm due to the strong refractive index modulation induced by fabricating method, which proposes a feasible idea for compact fiber curvature sensor design.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
