Improving the Spatial Resolution of a BOTDA Sensor Using Deconvolution Algorithm
نویسندگان
چکیده
Spatial resolution improvement from an acquired measurement using long pulse is developed for Brillouin optical time domain analysis (BOTDA) systems based on the total variation deconvolution algorithm. The frequency dependency of gain temporal envelope investigated by simulation, and its impact recovered results algorithm thoroughly analyzed. To implement a reliable process, differential pulse-width pair (DPP) technique utilized to effectively eliminate systematic shift (BFS) distortion stemming envelope. width pairs should be larger than 40 ns as analyzed theoretically verified experimentally. It has been demonstrated that proposed method can realize flexible adjustment spatial with enhanced signal-to-noise ratio (SNR) established pump pulse. In experiment, increased 0.5 m 1 high accuracy 60/40 DPP signals. Compared raw same resolution, 7.9 dB 5.9 SNR improvements are obtained respectively, thanks denoising capability sampling rate recovery also studied. sensing system allows distortion-free distributed higher conventional setup pairs.
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ژورنال
عنوان ژورنال: Journal of Lightwave Technology
سال: 2021
ISSN: ['0733-8724', '1558-2213']
DOI: https://doi.org/10.1109/jlt.2020.3047504