Dumbbell shaped inline Mach–Zehnder interferometer for glucose detection. (January 2015)

• Record Type: Journal Article
• Authors: Lokman, A.; Arof, H.; Harun, S.W.
• Is Part Of: Measurement. Volume 59(2015:Jan.)
• Page Start: 167
• Page End: 170
• Publication Date: 2015-01
• Subjects: Inline Mach Zehnder Interferometer (MZI) -- Fiber sensor -- Dumbbell-shape structure -- Refractive index -- Glucose; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2014.09.061
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: A simpler inline MZI with a dumbbell-shape structure is proposed. The MZI is used for measuring glucose concentration in distilled water. The proposed MZI structure comprises two bulges connected by a tapered waist. Abstract: A simple inline Mach Zehnder Interferometer (MZI) with a dumbbell-shaped structure is developed for measuring glucose concentration in distilled water. The MZI is fabricated using an arcing function of a fusion splicer. The sensor consists of two bulges separated by a tapered waist. The MZI generates a good reflected interference spectrum where the dip wavelength is red-shifted with the increase of glucose concentration. This is due to the increase of the surrounding refractive index, which reduces the phase difference between the core and cladding modes. As the glucose concentration increases from 0% to 12%, the dip wavelength increases from 1554.419 to 1554.939 nm in a quadratic manner with the coefficient of determination of 0.9818. It is also found that the sensor has a sensitivity of 0.04 nm/% with a linearity of 96.7%. The limit of detection is 4.5%. This preliminary result shows that the proposed probe can be used as a sensor to detect glucose concentration in distilled water.