Millimeter-level recognition capability of BOTDA based on a transient pump pulse and algorithm enhancement.

Brillouin optical time-domain analysis requires a pulsed pump to obtain a distributed Brillouin gain spectrum (BGS) containing environmental information, whose width corresponds to spatial resolution (SR). We propose a rising edge demodulation (RED) algorithm acting on Brillouin information generated by a transient pump pulse (

Keywords:

• Fast Fourier transform
• Demodulation
• Millimeter
• Signal edge
• Transient (oscillation)
• Pulse (signal processing)
• Optics
• Fiber Bragg grating
• Algorithm
• Materials science
• Brillouin zone

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