A refractive index sensing system has been demonstrated, which is based upon an in-line fibre long period grating Mach-Zehnder interferometer with a heterodyne interrogation technique. This sensing system has comparable accuracy to laboratory-based techniques used in industry such as high performance liquid chromatography and UV spectroscopy. The advantage of this system is that measurements can be made in-situ for applications in continuous process control. Compared to other refractive index sensing schemes using LPGs, this approach has two main advantages. Firstly, the system relies on a simple optical interrogation system and therefore has the real potential for being low cost, and secondly, so far as we are aware it provides the highest refractive index resolution reported for any fibre LPG device.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A high sensitivity long period grating Mach-Zehnder refractometer


    Contributors:
    Allsop, T. (author) / Webb, D.J. (author) / Bennion, I. (author)


    Publication date :

    2002-01-01


    Size :

    300699 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Investigation of Mach-Zehnder effects in tapered fibre long period gratings

    Allsop, T.D.P. / Floreani, F. / Webb, D.J. et al. | IEEE | 2005


    Fiber Optical Bragg Grating Refractometer

    Asseh, A. / Sandgren, S. / Aahlfeldt, H. et al. | British Library Online Contents | 1998


    Integrated Optical Mach-Zehnder Biosensor

    Luff, B. J. / Wilkinson, J. S. / Piehler, J. et al. | British Library Online Contents | 1998


    A Mach-Zehnder interferometer-based High Sensitivity Temperature sensor for human body monitoring

    Wang, Shu-na / Lv, Ri-qing / Zhao, Yong et al. | British Library Online Contents | 2018


    Nested-ring Mach–Zehnder interferometer

    Darmawan, S. / Chin, M. K. | British Library Online Contents | 2006