Probe pulse design in Brillouin optical time‐domain reflectometry

Brillouin optical time-domain reflectometry (BOTDR) is a branch of distributed fibre-optic sensors, and it can measure the strain temperature information, localised by return time probe pulse, along fibre based on spontaneous scattering process. Parameters BOTDR system, including spatial resolution, signal-to-noise ratio, measurement speed, sensing range, have mutually restrictive relationship. In order to improve performance researchers focussed improving design for example, transforming shape, sequence, spectral properties pulse. This study summarises recent progress in detection pulses systems, comprehensively demonstrates improvement effects various pulse modulation formats system performance.