A novel distributed fiber-optic localization algorithm with high sensitivity and precision based on merged Michelson-Sagnac interferometer is proposed and demonstrated. Abstract: In order to solve the problem that the dual Mach Zehnder (M-Z) interferometer system is easily affected by external environmental noise, a data signal-processing scheme based on Hilbert– Huang transform (HHT) is proposed to achieve high-precision location with distributed optical fibers. KACST-TIC in Radio Frequency and Photonics for the e-Society (RFTONICS), King Saud University (KSU), Riyadh 11421, Saudi Arabia Author to whom correspondence should be addressed. Among all optical sensing techniques, the distributed Sagnac loop (SI) sensor has the advantage of being simple to. Abstract: Among all optical sensing techniques, the distributed Sagnac loop (SI) sensor has the advantage of being simple to implement with low cost. Most of the proposed techniques for using SI exploit the frequency null method for event localization.
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