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Fiber optic angle sensor based on flat and concave mirror using a multimode fused coupler

M. YASIN1,* , Z. JUSOH2,3,4, H. A. RAHMAN2,3,4, M. D. ASHADI3, S.W. HARUN2,3, H. AHMAD5

Affiliation

  1. Department of Physics, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia.
  2. Photonics Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
  3. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
  4. Faculty of Electrical Engineering, Universiti Teknologi Mara (UiTM), Shah Alam, Malaysia.
  5. Photonics Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

Abstract

A simple fiber optic displacement sensor (FODS) is proposed and demonstrated for angle measurement. The proposed sensor utilizes a multimode fused coupler as a probe as well as a flat or concave mirror as the target. For the flat mirror, the highest sensitivity and the best resolution is obtained at 0.114 mV/° and 71 mrad, respectively; whereas the highest sensitivity and the best resolution that is attainable when the concave mirror is used are 0.40 mV/° and 2.1 mrad, respectively. The simplicity of the design, high degree of sensitivity, dynamic range and the low cost of the fabrication make it suitable for industry and research applications..

Keywords

Fiber optic, Angle sensor, A multimode fused coupler, Flat and concave mirror.

Submitted at: July 27, 2011
Accepted at: Oct. 20, 2011

Citation

M. YASIN, Z. JUSOH, H. A. RAHMAN, M. D. ASHADI, S.W. HARUN, H. AHMAD, Fiber optic angle sensor based on flat and concave mirror using a multimode fused coupler, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 10, pp. 1199-1202 (2011)