An ultra-high-resolution large-dynamic-range fiber optic static strain sensor using Pound-Drever-Hall technique

Liu, Qingwen; He, Zuyuan; Tokunaga, Tomochika; Hotate, Kazuo

doi:10.1109/iqec-cleo.2011.6194028

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…In Reference [ 61 ], the authors proposed a sensor realized with two FFPIs, one for sensing and the other one acting as reference. Differently from Reference [ 43 ], a Pound-Drever-Hall technique is employed as the interrogation technique in the readout.…”

Section: Performance Evaluation Of the Strain Sensorsmentioning

confidence: 99%

Fibre Bragg Grating Based Strain Sensors: Review of Technology and Applications

Campanella

Cuccovillo²,

Yurt³

et al. 2018

Sensors

360

185

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Fibre Bragg grating (FBG) strain sensors are not only a very well-established research field, but they are also acquiring a bigger market share due to their sensitivity and low costs. In this paper we review FBG strain sensors with high focus on the underlying physical principles, the interrogation, and the read-out techniques. Particular emphasis is given to recent advances in highly-performing, single head FBG, a category FBG strain sensors belong to. Different sensing schemes are described, including FBG strain sensors based on mode splitting. Their operation principle and performance are reported and compared with the conventional architectures. In conclusion, some advanced applications and key sectors the global fibre-optic strain sensors market are envisaged, as well as the main market players acting in this field.

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Section: Performance Evaluation Of the Strain Sensorsmentioning

confidence: 99%

Fibre Bragg Grating Based Strain Sensors: Review of Technology and Applications

Campanella

Cuccovillo²,

Yurt³

et al. 2018

Sensors

360

185

View full text Add to dashboard Cite

show abstract

“…One main reason is that the dynamic sensing is self-referenced, but the static strain sensing involves the comparison with an extra reference which is usually a frequency-stabilized component or an identical sensor head but free of strain. In our previous work we have reported several realizations of nε-order static strain resolution sensors based on interrogation with narrow linewidth tunable laser sources [2,3]. Further enhancing the resolution of those sensors, however, requires higher wavelength accuracy during sweeping of the laser sources, which cannot be improved simply.…”

mentioning

confidence: 99%

Sub-nano resolution static strain fiber sensor using a novel sideband interrogation technique

Liu

Tokunaga

et al. 2011

IEEE Photonic Society 24th Annual Meeting

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A novel sideband interrogation technique was proposed to measure the resonance difference between two Fabry-Perot interferometers. With this technique sub-nano static strain-resolution was demonstrated experimentally for the first time to the best of our knowledge. IntroductionGeophysics research requires monitoring the earth's deformation continuously at locations as many as possible with a resolution on the order of nano-strains (nε) in static to low frequency region. Optical fiber sensors are very attractive for this field due to their unique advantages, especially small size and easy deployment. However, although they have achieved very high resolution even better than nε for dynamic sensing, such as hydrophones [1], optical fiber sensor are not so successful in the field of static strain sensing up to now. One main reason is that the dynamic sensing is self-referenced, but the static strain sensing involves the comparison with an extra reference which is usually a frequency-stabilized component or an identical sensor head but free of strain. In our previous work we have reported several realizations of nε-order static strain resolution sensors based on interrogation with narrow linewidth tunable laser sources [2,3]. Further enhancing the resolution of those sensors, however, requires higher wavelength accuracy during sweeping of the laser sources, which cannot be improved simply.In this work, we report a novel sideband interrogation technique to measure the resonance difference between a pair of fiber Fabry-Perot interferometers (FFPI) with extremely high resolution. With this technique, an ultra-high wavelength resolution corresponding to a static strain resolution down to 0.6 nε was demonstrated in experiments, and the measuring period is only a few seconds.

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