Subfrequency noise signal extraction in fiber-optic strain sensors using postprocessing

Timothy T.-Y. Lam; Malcolm B. Gray; Daniel A. ShaddockDavid E. McClellandJong H. Chow

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Subfrequency noise signal extraction in fiber-optic strain sensors using postprocessing

机译：使用后处理在光纤应变传感器中提取亚频噪声信号

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Laser frequency fluctuations typically limit the performance of high-resolution interferometric fiber strain sensors. Using time delay interferometry, we demonstrate a frequency noise immune fiber sensing system, where strain signals were extracted well below the noise floor normally imposed by the frequency fluctuations of the laser. Initial measurements show a reduction in the noise floor by a factor of 30, with strain sensitivities of a nanostrain/(Hz)~(1/2) at 100 mHz and reaching 100ps/(Hz)~(1/2) at 1 Hz. Further characterization of the system indicates the potential for at least 4.5 orders of magnitude frequency fluctuation rejection.

机译：激光频率波动通常会限制高分辨率干涉光纤应变传感器的性能。使用延时干涉测量法，我们展示了一种频率噪声抗光纤传感系统，其中应变信号被提取到远低于通常由激光频率波动施加的本底噪声。初步测量表明，本底噪声降低了30倍，在100 mHz时应变灵敏度为纳应变/（Hz）~（1/2），在1 Hz时应变灵敏度达到100ps/（Hz）~（1/2）。该系统的进一步表征表明，至少存在4.5个数量级的频率波动抑制。

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来源
《Optics Letters》 |2012年第11期|2169-2171|共3页
作者
Timothy T.-Y. Lam; Malcolm B. Gray; Daniel A. ShaddockDavid E. McClellandJong H. Chow;
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作者单位

Centre for Gravitational Physics, Department of Quantum Science, The Australian National University Building, 38a Science Road, Acton, Australian Capital Territory 0200, Australia;

Length, Time and Optical Standards Section, National Measurement Institute, Bradfield Road, Lindfield, New South Wales 2070, Australia;

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正文语种英语
中图分类计量学;
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2. Formularization of noise induced by stray magnetic field in fiber-optic current sensor [J] . Konishi Yoshiaki, Kazuo Hotate 電子情報通信学会技術研究報告. 光エレクトロニクス. Optoelectronics . 2001,第92期

机译：Formularization of noise induced by stray magnetic field in fiber-optic current sensor
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4. Noise Cancellation with Static Mixtures of a Nonstationary Signal and Stationary Noise [O] . Sharon Gannot, Arie Yeredor 2003

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Subfrequency noise signal extraction in fiber-optic strain sensors using postprocessing

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