Temperature-insensitive pressure transducer based on reflected broadened spectrum with enhanced sensitivity

• Main Authors: Vorathin, E., Z. M., Hafizi, A. M., Aizzuddin, K. S., Lim
• Format: Article
• Language: English
• Published: Elsevier 2019
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://umpir.ump.edu.my/id/eprint/24265/1/Temperature-insensitive%20pressure%20transducer%20based%20on%20reflected.pdf; http://umpir.ump.edu.my/id/eprint/24265/; https://doi.org/10.1016/j.sna.2019.01.028; https://doi.org/10.1016/j.sna.2019.01.028

Pasting of half the grating of an FBG sensor on a natural rubber diaphragm was used to sense the pressure measurement. The pressure-induced strain on half of the grating resulted in bandwidth broadening. From the pressure range of 0 kPa to 20 kPa, the pressure sensitivity at 15 dB bandwidth changed was obtained at 77.7 pm/kPa with 99.94% of linearity. Through total reflected power monitoring via photodetector, the pressure transducer retrieved a sensitivity of 0.1686 dB m/kPa and evaded a complex demodulation technique. As a result of the temperature-independent bandwidth change, the pressure transducer was totally temperature insensitive.