Photonic Sensors, Volume. 3, Issue 1, 52(2013)

Temperature-Independent Torsion Sensor Based on “Figure-of-Eight” Fiber Loop Mirror

Ricardo M. SILVA1, António B. Lobo RIBEIRO2, and Orlando FRAZAO1、*
Author Affiliations
  • 1INESC Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal, Departamento de Física da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
  • 2Faculty of Health Sciences, University Fernando Pessoa, R. Carlos da Maia 296, 4200-150 Porto, Portugal
  • show less

    An interrogation sensor system combining the “figure-of-eight” fiber loop mirror using a single directional 3×3 fiber optic coupler was proposed. One fiber loop mirror was formed by inserting a length of high birefringent optical fiber at the input ports of the 3×3 coupler. Splicing the output ports of the 3×3 coupler between them created the other fiber loop mirror. The introduction of this second loop gave rise to two polarization states of light with the same frequency but different optical phase. The mechanical torsion sensing head was located at the second loop and was exhibited an average modulus torsion sensitivity of 7.9×10-4 degree/dB. The performance of the sensor was not affected by environmental temperature variations.

    Tools

    Get Citation

    Copy Citation Text

    Ricardo M. SILVA, António B. Lobo RIBEIRO, Orlando FRAZAO. Temperature-Independent Torsion Sensor Based on “Figure-of-Eight” Fiber Loop Mirror[J]. Photonic Sensors, 2013, 3(1): 52

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Regular

    Received: Jul. 17, 2012

    Accepted: Jul. 28, 2012

    Published Online: Apr. 16, 2013

    The Author Email: FRAZAO Orlando (ofrazao@inescporto.pt)

    DOI:10.1007/s13320-012-0082-3

    Topics