Low power signal processing for demodulation of wide dynamic range of interferometric optical fibre sensor signals
N. Fernandes, KROHNE Marshall Pvt Ltd., (India); L. Grossner, H. Krisch, KROHNE Messtechnik GmbH (Germany)
The linear phase demodulation of a signal from the detector of an interferometer, subjected to alternating elongation for large dynamic range crossing a number of fringes, with low power signal processing has been implemented using different schemes. These include phase generated carrier homodyne demodulation (PCHD), pseudo-heterodyne and finally a power optimized phase tracker.
