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Multiplexing Bragg gratings using combined wavelength and spatial division techniques with digital resolution enhancement

Multiplexing Bragg gratings using combined wavelength and spatial division techniques with digital resolution enhancement

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  • Author(s): Y. Hu 1 ; S. Chen 2 ; L. Zhang 3 ; I. Bennion 3
    • View affiliations
    • Affiliations: 1: School of Electrical, Electronic and Information Engineering, South Bank University, London, United Kingdom
      2: Department of Mechanical Engineering, Smart Materials and Structures Research Centre, University of Maryland, College Park, USA
      3: Photonics Research Group, Aston University, Birmingham, United Kingdom
  • Source: Volume 33, Issue 23, 6 November 1997, p. 1973 – 1975
    DOI:  10.1049/el:19971326 , Print ISSN 0013-5194, Online ISSN 1350-911X
© IEE
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A novel multiplexing technique is described, which employs an imaging spectrograph to interrogate fibre Bragg gratings in multiple fibre channels simultaneously, and digital algorithms to enhance the spectral resolution. An equivalent strain sensing resolution of 1.6 µɛ has been achieved in the preliminary experiments.

Inspec keywords: optical crosstalk; wavelength division multiplexing; diffraction gratings; optical fibre communication

Other keywords: multiplexing technique; spectral resolution; digital algorithms; imaging spectrograph; WDM; equivalent strain sensing resolution; digital resolution enhancement; spatial division techniques; fibre Bragg gratings; Bragg gratings; multiple fibre channels

Subjects: Optical communication; Fibre optics; Photonic switching systems

References

    1. 1)
      • Davis, M.A., Bellmore, D.G., Putnam, M.A., Kersey, A.D.: `A 60 element fiber Bragg grating sensor system', Proc. OFS-11, May 1996, Sapporo, Japan, p. 100–103.
    2. 2)
      • Y. Hu , S. Chen . An electronic scanning spatial domain multiplexing technique for interferometricoptical fiber sensor arrays. IEEE Photonics Technol. Lett. , 673 - 675
    3. 3)
      • C.G. Askins , M.A. Putnam , E.J. Friebele . Instrumentation for interrogating many-element fiber Bragg grating arrays. Proc. SPIE , 257 - 266
    4. 4)
      • D.A. Jackson , A.B.L. Ribeiro , L. Reekie , J.L. Archambault . Simple multiplexing scheme for a fiber-optic grating sensor network. Opt. Lett. , 1192 - 1194
    5. 5)
      • Chen, S., Hu, Y.: `Recent progress in digital spatial domain multiplexing technique', Proc. OFS-11, May 1996, Sapporo, Japan, p. 542–545.
    6. 6)
      • Ezbiri, A., Munoz, A., Kanellopoulos, S.E., Handerek, V.A.: `High resolution fibre Bragg grating sensor demodulation using a diffractiongrating spectrometer and CCD detection', Proc. Colloquium on Optical Techniques for Smart Structuresand Structural Monitoring, 1997, UK, ISSN 0963-3308, Pub. IOP.
    7. 7)
      • Y.J. Rao , A.B.L. Ribeiro , D.A. Jackson , L. Zhang , I. Bennion . Simultaneous spatial, time and wavelength division multiplexed in-fibergrating sensing network. Opt. Commun. , 53 - 58
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