Performance comparison between plastic-based fiber bundle and multimode fused coupler as probes in displacement sensors

• Published in: Laser physics Vol. 20; no. 10; pp. 1890 - 1893
• Main Authors: Yasin, M., Harun, S. W., Pujiyanto, Ghani, Z. A., Ahmad, H.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.10.2010; Springer
• Subjects: Exact sciences and technology; Fiber Optics; General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Coupler; Flat Mirror; Displacement Sensor; Laser Phys; Coupling Ratio; Optical sensors; Fiber bundle; Plastics; Displacement sensor; Displacement measurement
• ISSN: 1054-660X; 1555-6611
• DOI: 10.1134/S1054660X10190199

Fiber optic displacement sensors with bundled and fused coupler fiber probes are being investigated. The effects of axial displacements on the detected output voltages are also investigated for fiber bundle probe sensor. The resolutions obtained are 0.9 and 4.0 μm, for the front and back slopes, respectively. A comparison is made with a commercial plastic based multimode fused coupler which gives a better range of 2.0 mm. This is longer than that achieved by the fiber bundle probe which is only 0.4 mm and has a lower resolution of 34 μm for the case of 50:50 coupling ratio.