Centimeter-level spatial resolution Brillouin optical time domain analyzer using mono-pulse self-difference
Qian Zhang, Tao Wang, Jian Li, Yahui Wang, Jingyang Liu, Mingjiang Zhang
Abstract
To break through the limitation of pulse width on spatial resolution in the Brillouin optical time-domain analysis system (BOTDA), a novel, to the best of our knowledge, scheme based on mono-pulse self-difference (MPSD) is proposed for centimeter-level spatial resolution. It is performed by the self-difference of the temporal trace generated by a single-shot long pulse in the conventional BOTDA. The concept-proof of the proposed approach is demonstrated, and experimental results are presented where distributed temperature sensing with a 5-cm spatial resolution is realized based on a 40-ns pulse along a 2-km sensing fiber.
Topics & Concepts
OpticsImage resolutionBrillouin zonePulse (music)Time domainBrillouin scatteringCentimeterResolution (logic)Temporal resolutionMaterials scienceOptical fiberPhysicsComputer scienceDetectorComputer visionAstronomyArtificial intelligenceAdvanced Fiber Optic SensorsAdvanced Fiber Laser TechnologiesPhotonic and Optical Devices