• DocumentCode
    1283939
  • Title

    Demodulation techniques for two-mode elliptical-core fibre sensors

  • Author

    Wang, A.B. ; Murphy, K.A. ; Vengsarkar, A.M. ; Claus, R.O.

  • Author_Institution
    Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburgh, VA, USA
  • Volume
    27
  • Issue
    16
  • fYear
    1991
  • Firstpage
    1454
  • Lastpage
    1456
  • Abstract
    Demodulation methods are presented that allow measurement of the amplitude and the direction of dynamically varying environmental parameters with two-mode, elliptical-core fibre sensors. The wavelength dependence of the differential phase-shift between the and the LP01 and the LP11even modes is used to obtain quadrature-phase-shifted signals at the sensor output. It is also shown that a two-fibre coupler attached to the output of the sensing fibre enables stable demodulation.
  • Keywords
    fibre optic sensors; demodulation techniques; differential phase-shift; quadrature-phase-shifted signals; stable demodulation; two-fibre coupler; two-mode elliptical-core fibre sensors; wavelength dependence;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19910911
  • Filename
    81298
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1283939