A high sensitivity refractometer based upon a long period grating Mach–Zehnder interferometer
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- 27 March 2002
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 73 (4), 1702-1705
- https://doi.org/10.1063/1.1459093
Abstract
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 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.
Keywords
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