Search results for: Harpreet K. Bal
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Effects of fabrication conditions on an alternative type of pi-phase-shifted fibre Bragg grating at twice the Bragg wavelength were investigated, showing that slight variations in the alignment of phase mask affect the grating spectra.
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Optical fibre Bragg gratings were fabricated in 3 different fibres, and their spectra at 3 harmonics were measured and cross-compared with images of their internal complex refractive index profiles obtained via differential interface contrast imaging.
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We demonstrate a low pressure sensor based on a fibre Bragg grating (FBG) for human skin pressure underneath compression stockings. Calibration and comparison with conventional pressure sensors is presented.
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A low-cost, high-accuracy fibre optic sensor probe to determine state of charge (SOC) of battery is demonstrated. Capability of extension to multipoint measurements of SOC of stock batteries is also discussed.
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In the context of current/voltage sensing by electric field monitoring it can be of importance to amplify the effect of the field at the sensor's head. We present such an amplification — or energy harvesting — device in the form of a simple antenna coupled with a liquid crystal-based sensor for the monitoring of high-power lines.
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An alternative fabrication process targeting the etching of fibre Bragg gratings (FBGs) is presented. The performance of the resulting grating is demonstrated by developing a glycerine composition sensor based on refractive index changes.
