Wide-Dynamic-Range Brillouin Optical Correlation-Domain Reflectometry With 20-kHz Sampling Rate

Guangtao Zhu, Kazuya Kishizawa, Kohei Noda, Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno

研究成果: Article査読

抄録

Brillouin optical correlation-domain reflectometry (BOCDR) is known as one of the distributed fiber-optic strain/temperature sensing techniques. Recently, a high-speed BOCDR configuration with no measurable strain limit has been developed, but only a sampling rate of 50 Hz has been experimentally demonstrated, limited by the use of a commercial microwave frequency sweeper (MFS). In this work, by replacing the MFS with an independent voltage-controlled oscillator driven by a function generator, we experimentally show via vibration detection that this system can achieve a sampling rate of up to 20 kHz. We newly observe the systematic noise peculiar to such high-speed operation, which is found to originate from the unintended intensity modulation of the laser output. We also demonstrate the suppression of this noise by band-elimination filtering.

本文言語English
ページ(範囲)6644-6650
ページ数7
ジャーナルIEEE Sensors Journal
22
7
DOI
出版ステータスPublished - 2022 4月 1

ASJC Scopus subject areas

  • 器械工学
  • 電子工学および電気工学

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