Performance improvement of a self-heterodyne detection BOTDR system employing broad-band laser

Li, Xiaojuan; Li, Yongqian; Zeng, Wen; Fan, Heng; Zhang, Lixin

doi:10.1007/s11801-018-8052-7

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Results showed that the use of broad-band laser in the self-heterodyne detection system can effectively eliminate the adverse effects of the laser frequency instability on the system performance. Compared to the local heterodyne detection system, the maximum temperature errors measured by the narrow-band laser and the broad-band laser based on the self-heterodyne BOTDR system are reduced from 5.3 and 7.9°C to 2.4 and 1.2°C respectively [67,68].…”

Section: Broad-band Laser Using In Botdrmentioning

confidence: 99%

Probe pulse design in Brillouin optical time‐domain reflectometry

Wang

et al. 2022

IET Optoelectronics

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

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Section: Broad-band Laser Using In Botdrmentioning

confidence: 99%