抄録
We propose a technique in BOTDR fiber sensor to generate a pair of pulsed probes via intensity modulation scheme for measuring distributed strain at high spatial resolution. The first probe consists of a long-and short duration of pulses separated by a short interval. The second probe only has the long pulse of the first probe. Introducing FFT in correlating the backscattered signals sampled by wide and narrow window functions for each probe gives narrow Brillouin spectrum width. The subtraction of the correlated signals obtained by the two probes results in high spatial resolution measurement. The intensity modulation makes it easier to generate the pair of pulsed probes having the same waveform of the long pulse and to obtain the results according to the measurement principle. We have achieved 0.2 m spatial resolution and 3.2 MHz Brillouin frequency accuracy in measuring a 350 m fiber.
本文言語 | English |
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ホスト出版物のタイトル | 2018 IEEE 7th International Conference on Photonics, ICP 2018 |
出版社 | Institute of Electrical and Electronics Engineers Inc. |
ISBN(電子版) | 9781538611876 |
DOI | |
出版ステータス | Published - 2018 11月 12 |
イベント | 7th IEEE International Conference on Photonics, ICP 2018 - Langkawi, Kedah, Malaysia 継続期間: 2018 4月 9 → 2018 4月 11 |
Other
Other | 7th IEEE International Conference on Photonics, ICP 2018 |
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国/地域 | Malaysia |
City | Langkawi, Kedah |
Period | 18/4/9 → 18/4/11 |
ASJC Scopus subject areas
- コンピュータ ネットワークおよび通信
- 信号処理
- 電子工学および電気工学
- 原子分子物理学および光学