A high sensitivity refractometer based upon a long period grating Mach-Zehnder interferometer


A low cost interrogation scheme is demonstrated for a refractometer based on an in-line fiber long period grating (LPG) Mach–Zehnder interferometer. Using this interrogation scheme the minimum detectable change in refractive index of ?n ~ 1.8×10-6 is obtained, which is the highest resolution achieved using a fiber LPG device, and is comparable to precision techniques used in the industry including high performance liquid chromatography and ultraviolet spectroscopy.

Publication DOI: https://doi.org/10.1063/1.1459093
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Copyright (2002) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Allsop, Thomas D.P.; Reeves, R.; Webb, David J.; Bennion, Ian and Neal, R. (2002). A high sensitivity refractometer based upon a long period grating Mach-Zehnder interferometer. Review of Scientific Instruments, 73 (4), pp. 1702-1705 and may be found at http://rsi.aip.org/resource/1/rsinak/v73/i4/p1702_s1.
Uncontrolled Keywords: interrogation scheme,refractometer,an in-line fiber long period grating,Mach–Zehnder interferometer,high performance liquid chromatography,ultraviolet spectroscopy
Publication ISSN: 1089-7623
Last Modified: 14 May 2024 17:49
Date Deposited: 14 Dec 2010 09:18
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Related URLs: http://rsi.aip. ... v73/i4/p1702_s1 (Publisher URL)
PURE Output Type: Article
Published Date: 2002-04
Authors: Allsop, Thomas D.P. (ORCID Profile 0000-0001-8905-9014)
Reeves, R.
Webb, David J. (ORCID Profile 0000-0002-5495-1296)
Bennion, Ian
Neal, Ron



Version: Published Version

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