A high sensitivity long period grating Mach-Zehnder refractometer

Thomas D.P. Allsop, D.J. Webb, I. Bennion

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.
Original languageEnglish
Title of host publication15th Optical Fiber Sensors conference technical digest, 2002
PublisherIEEE
Pages123-126
Number of pages4
Volume1
ISBN (Print)0-7803-7289-1
DOIs
Publication statusPublished - 2002
Event15th conference on Optical Fibre Sensors - Portland, Oregon, United States
Duration: 10 May 2002 → …

Conference

Conference15th conference on Optical Fibre Sensors
Abbreviated titleOFS 2002
CountryUnited States
CityPortland, Oregon
Period10/05/02 → …

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  • Research Output

    • 3 Conference contribution

    Fiber grating type dependence of temperature and strain coefficients and application to simultaneous temperature and strain measurement

    Shu, X., Liu, Y., Zhao, D., Gwandu, B., Floreani, F., Zhang, L. & Bennion, I., 2002, 15th Optical Fiber Sensors conference technical digest, 2002. IEEE, Vol. 1. p. 83-86 4 p. TuB4

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • High sensitivity sensors utilising characteristics of dispersion-turning-point of long-period gratings in B/Ge co-doped fibre

    Shu, X., Zhang, L. & Bennion, I., 2002, 15th Optical Fiber Sensors conference technical digest, 2002. IEEE, Vol. 1. p. 573-576 4 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Sensing applications of arrayed waveguide grating devices

    Webb, D. J. & Pechstedt, R. D., 2002, 15th Optical Fiber Sensors conference technical digest, 2002. IEEE, Vol. 1. p. 569-572 4 p. FB2

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Cite this

    Allsop, T. D. P., Webb, D. J., & Bennion, I. (2002). A high sensitivity long period grating Mach-Zehnder refractometer. In 15th Optical Fiber Sensors conference technical digest, 2002 (Vol. 1, pp. 123-126). [TuD 3] IEEE. https://doi.org/10.1109/OFS.2002.1000517