Characterization of Multiple-bend Optical Fiber Extensometer Design for Landslide Sensor

• Main Authors: Aldo Novaznursyah Costrada, Sixtinah Deswilan, Badrul Mustafa Kemal, Harmadi Harmadi
• Format: Article
• Language: English
• Published: Jurusan Fisika, FMIPA Universitas Andalas 2021-02-01
• Series: JIF (Jurnal Ilmu Fisika)
• Online Access: http://jif.fmipa.unand.ac.id/index.php/jif/article/view/402

Design of multiple-bend extensometer based on optical fiber as landslide sensor has been characterized. Multiple-bending characterization has been done by varying the winding number of optical fiber FD-620-10 to obtain the photodiode's effective light intensity.  The light intensity in the extensometer was set by varying the laser diode resistance in the range (150 – 250) Ω.  The optimum sensitivity of 0.03984 V/cm was obtained for triple winding of optical fiber. The designed optical extensometer is able to monitor the displacement with an error of 0.59%. This result indicates that the designed extensometer is the more bending on optical fiber, the more its sensitivity and the bending loss.