In recent years growing interest has surrounded the development of fiber laser sensors (FLS). This is due to their ultra high sensitivity to temperature and strain as well as their ability to be multiplexed along a single fiber using WDM techniques. It is their extreme sensitivity that has led to them being considered as acoustic pressure sensors rather than standard fiber Bragg gratings. The work presented here describes the development of an array of FLS configured as hydrophones. We discuss the design of the single mode fiber laser used throughout our system; comparing examples based upon distributed Bragg reflectors (DBR) and distributed feedback (DFB). In addition we discuss both the theoretical and experimental acoustic sensitivity enhancements obtained by the application of an elasto-plastic coating to the FLS. The array configuration is described, as is the heterodyne interrogation scheme using an unbalanced Mach-Zehnder interferometer with WDM channel selection. Results from the measurement of the minimal detectable acoustic signal of a bare fiber laser are shown to be -69 dB re.Pa/(root)Hz at 1 kHz when using a 200 m path imbalanced readout interferometer. Further gains in the sensitivity due to the application of various coatings are reported, as is a full characterization of an array of fiber laser hydrophones. Finally we discuss the future research of the FLS, and the areas in which the technology is particularly applicable.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Fiber laser hydrophone array


    Beteiligte:
    Hill, David J. (Autor:in) / Nash, Phillip J. (Autor:in) / Jackson, David A. (Autor:in) / Webb, David J. (Autor:in) / O'Neill, S. F. (Autor:in) / Bennion, Ian (Autor:in) / Zhang, Lin (Autor:in)

    Kongress:

    Fiber Optic Sensor Technology and Applications ; 1999 ; Boston,MA,USA


    Erschienen in:

    Erscheinungsdatum :

    1999-12-09





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Analysis of mode instability in DFB fiber laser hydrophone array

    Zhang, Haiyan / Zheng, Baichao / Li, Pan et al. | SPIE | 2019


    Fiber-Optic Hydrophone

    McDearmon, Graham F. / Brooker, J. T. | SPIE | 1990


    Deep-ocean hydrophone array

    Behrens, J.A. / Stokes, R.H. | Tema Archiv | 1977


    High Performance UltraThin Fiber Laser Vector Hydrophone

    Wentao, Z. / Rui, M. / Fang, L. | British Library Online Contents | 2012


    Towards a High Performance Fiber Laser Hydrophone

    Foster, S. / Tikhomirov, A. / van Velzen, J. | British Library Online Contents | 2011