High-resolution Raman-assisted Brillouin sensor based on Differential Pulse-width Pair Technique

摘要

High sensing resolution in long-distance distributed fiber optic sensors, such as Brillouin Optical Time Domain Analysis\ud(BOTDA), cannot be trivially achieved due to several issues including self-phase modulation, resolution-uncertainty\udtrade-offs and fiber attenuation. These problems could be fixed by the use of differential pulse-pair techniques in\udcombination with Raman amplification. In this work we present a Differential Pulse-width Pair (DPP) Raman-assisted\udBOTDA sensor, that can achieve 1 meter resolution in a 100 km range.