A fast positioning algorithm for the asymmetric dual Mach–Zehnder interferometric infrared fiber vibration sensor

摘要

Highlights ? We propose a fast positioning algorithm to shorten the response time of ADMZI. ? The principles of ADMZI and the fast positioning algorithm are described. ? A positioning measurement experiment was carried out. ? The processing speed is improved by 5 times. Abstract We propose a fast positioning algorithm for the asymmetric dual Mach–Zehnder interferometric infrared fiber vibration sensor. Using the approximately derivation method and the enveloping detection method, we successfully eliminate the asymmetry of the interference outputs and improve the processing speed. A positioning measurement experiment was carried out to verify the effectiveness of the proposed algorithm. At the sensing length of 85km, the experimental results show that the mean positioning error is 18.9m and the mean processing time is 116ms. The processing speed is improved by 5 times compared to what can be achieved by using the traditional time-frequency analysis-based positioning method. ]]>