Second-Order Nonlocal Effects Mitigation in Brillouin Optical Time-Domain Analysis Sensors by Tracking the Brillouin Frequency Shift Profile of the Fiber
We report on an additional limitation that has been found in Brillouin optical time-domain analysis (BOTDA) sensors due to the so-called second-order nonlocal effects (NLE).Second-order NLE appear in BOTDA setups that deploy a double probe waves to click here compensate the transfer of energy between the pump pulse and the probe wave, and are relat