Measuring attostrains in a slow-light fiber Bragg grating

Skolianos, George; Arora, Arushi; Bernier, Martin; Digonnet, Michel J. F.

doi:10.1117/12.2220219

Cited by 10 publications

(10 citation statements)

References 18 publications

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“…Moving on to higher frequencies, the strain resolution reaches about 75 fε/ÝHz at 1 kHz, 60 fε/ÝHz at 2 kHz and 40 fε/ÝHz at 23 kHz. These results are better than the strain resolutions achieved with phase-shifted FBGs [12] and slow-light FBGs [18] by roughly a factor of two. They also appear to be better than some of the prior results based on FFPI sensors at frequencies above 1 kHz [34].…”

Section: Resultsmentioning

confidence: 74%

“…5 that the overall noise floor is well above the respective levels of fiber thermal noise, electronic noise and shot noise. This indicates that laser noises (including both intensity noise and frequency noise), which typically dominate in resonator-based sensing systems [12], [18] are likely the dominant limiting factor for the strain resolution. In addition, residual fluctuations of the FFPI sensor due to environment-induced perturbations and the ASE noise due to the EDFA may also contribute to the overall noise floor.…”

Section: Resultsmentioning

confidence: 99%

“…It should be emphasized here that the above ultrahigh strain resolutions have been achieved using only an off-the-shelf diode laser with a 6-kHz linewidth, without any additional laser stabilization. The modest requirement in laser linewidth is especially interesting considering the fact that such scales of resolution typically require a light source with a linewidth on the order of 100 Hz [12], [18], [34], which can only be achieved with highly specialized narrow-linewidth lasers such as random distributed fiber lasers [12] or with laser-frequency referencing to OFC [34]. This highlights a key advantage of the current scheme, i.e., ultrahigh resolution can be achieved with simple and commercially available light sources, which can potentially make UHR sensing much more accessible to a broad range of users.…”

Section: Discussionmentioning

confidence: 99%

“…In particular, a recent report by Liu et al has demonstrated a strain resolution of 140 fε/ÝHz at 1 kHz by locking a laser to the resonant peak of a π -phase-shifted FBG [12]. Meanwhile, ultrahigh strain resolution has also been realized with extremely narrow slow-light resonance peaks [13]- [18]. These peaks exist near both edges of the band gap of an FBG under the conditions of strong grating-index modulation, low internal loss, optimized apodization of index profile, and a suitable length [13]- [16].…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that such ultra-narrow spectral features can lead to ultrahigh sensing resolutions. For example, by probing slow-light resonances, Skolianos et al has demonstrated strain resolutions of 30 fε/ÝHz at 30 kHz and 110 fε/ÝHz at 2 kHz [18].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ultrahigh-Resolution Fiber-Optic Sensing Based on High-Finesse, Meter-Long Fiber Fabry-Perot Resonators

Hoque

Duan

2020

IEEE Photonics J.

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Ultrahigh-resolution fiber-optic sensing has found a wide range of potential applications. However, the techniques reported so far are all based on highly specialized fiber structures and interrogation lasers, which are not widely available. In this paper, we report the demonstration of ultrahigh strain resolutions using only off-the-shelf commercial components. Our method leverages the high wavelength discrimination of long, high-finesse fiber Fabry-Perot interferometers (FFPI), using two 1 m-long FFPIs, one as the sensor and the other as a frequency reference. By locking the interrogation laser to the reference interferometer, which is co-packaged with the sensor interferometer, large, environmentinduced sensing background is removed. This allows the laser to reliably probe the strains applied on the sensor with very high resolutions. A nominal, noise-limited strain resolution of 800 fε/ÝHz has been achieved within 1-100 Hz. Strain resolution further improves to 75 fε/ÝHz at 1 kHz, 60 fε/ÝHz at 2 kHz and 40 fε/ÝHz at 23 kHz, demonstrating better resolutions than proven techniques such as π-phase-shifted and slow-light fiber Bragg gratings. The work lays out a cost-effective scheme to achieve ultrahigh-resolution fiber-optic sensing.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultrahigh-Resolution Fiber-Optic Sensing Based on High-Finesse, Meter-Long Fiber Fabry-Perot Resonators

Hoque

Duan

2020

IEEE Photonics J.

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High sensitive and large dynamic range quasi-distributed sensing system based on slow-light π-phase-shifted fiber Bragg gratings

Dwivedi¹,

Osuch²,

Trivedi³

2019

Opto-Electronics Review

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In this paper, we theoretically analyze the slow-light -phase-shifted fiber Bragg grating (-FBG) and its applications for single and multipoint/quasi-distributed sensing. Coupled-mode theory (CMT) and transfer matrix method (TMM) are used to establish the numerical modeling of slow-light -FBG. The impact of slow-light FBG parameters, such as grating length (L), index change ( n), and loss coefficient (˛) on the spectral properties of -FBG along with strain and thermal sensitivities are presented. Simulation results show that for the optimum grating parameters L = 50 mm, n = 1.5×10 −4 , and ˛ = 0.10 m -1 , the proposed slow-light -FBG is characterized with a peak transmissivity of 0.424, the maximum delay of 31.95 ns, strain sensitivity of 8.380 -1 , and temperature sensitivity of 91.064 • C -1 . The strain and temperature sensitivity of proposed slow-light -FBG is the highest as compared to the slow-light sensitivity of apodized FBGs reported in the literature. The proposed grating have the overall full-width at half maximum (FWHM) of 0.2245 nm, and the FWHM of the Bragg wavelength peak transmissivity is of 0.0798 pm. The optimized slow-light -FBG is used for quasi-distributed sensing applications. For the five-stage strain quasi-distributed sensing network, a high strain dynamic range of value 1469 is obtained for sensors wavelength spacing as small as 2 nm. In the case of temperature of quasi-distributed sensing network, the obtained dynamic range is of 133 • C. For measurement system with a sufficiently wide spectral range, the -FBGs wavelength grid can be broadened which results in substantial increase of dynamic range of the system.

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Sensitivity Enhancement of Fiber Accelerometer Based on Slow-Light Phase-Shifted Fiber Bragg Gratings in Single-Core and Multi-Core Fiber

Li,

Wang,

Luo

et al. 2024

J. Lightwave Technol.

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Measuring attostrains in a slow-light fiber Bragg grating

Cited by 10 publications

References 18 publications

Ultrahigh-Resolution Fiber-Optic Sensing Based on High-Finesse, Meter-Long Fiber Fabry-Perot Resonators

Ultrahigh-Resolution Fiber-Optic Sensing Based on High-Finesse, Meter-Long Fiber Fabry-Perot Resonators

High sensitive and large dynamic range quasi-distributed sensing system based on slow-light π-phase-shifted fiber Bragg gratings

Sensitivity Enhancement of Fiber Accelerometer Based on Slow-Light Phase-Shifted Fiber Bragg Gratings in Single-Core and Multi-Core Fiber

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