A 3-component fiber-optic accelerometer for well logging

Zeng, Nan; Shi, Cheng; Zhang, M.; Wang, Li Wei; Liao, Yanbiao; Lai, Shaoyong

doi:10.1016/j.optcom.2004.02.008

Cited by 58 publications

(26 citation statements)

References 16 publications

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“…The intensity profile presents a peak at the phase shift point where z=0, yielding a maximum sensitivity at this point. Equation (3) indicates that the sensitivity is proportional to the grating coupling strength. Figure 3 shows the measured longitudinal sensitivity profile by scanning the loading position with a glass rod of 5.1 gram rolling along the fiber length via quasi-point contact by use of the setup described in [12].…”

Section: Sensitivity and Noisementioning

confidence: 99%

“…To date, photonic accelerometers have been demonstrated in many different schemes to attain higher detection limit. Interferometric accelerometers have been fabricated by using a compliant cylinder or a central/edge-supported flexural disc to elongate optical fibers [3][4][5]. An accelerometer with a minimum detectable acceleration of 84 ng/Hz 1/2 has been achieved with 75-meter long optical fiber [4].…”

Section: Introductionmentioning

confidence: 99%

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Compact dual-frequency fiber laser accelerometer with sub-μg resolution

et al. 2016

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Abstract:We demonstrate a compact and high-resolution dual-polarization fiber laser accelerometer. A spring-mass like scheme is constructed by fixing a 10-gram proof mass on the laser cavity to transduce applied vibration into beat-frequency change. The loading is located at the intensity maximum of intracavity light to maximize the optical response. The detection limit reaches 107 ng/Hz 1/2 at 200 Hz. The working bandwidth ranges from 60 Hz to 600 Hz.

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Section: Sensitivity and Noisementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compact dual-frequency fiber laser accelerometer with sub-μg resolution

et al. 2016

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“…Comparison with other accelerometers, fiber-optic accelerometers possess the following advantages, including the small size, high immunity to electromagnetic interference, good ability to operate in a wide range of environments, high sensitivity, and good potential for multiplexing [3]. According to operation principles, fiber-optic accelerometers can be categorized as the intensity modulation fiber-optic accelerometers and phase modulation fiber-optic accelerometers.…”

Section: Introductionmentioning

confidence: 99%

Study on a Single-axis Fabry-perot Fiber-optic Accelerometer and its Signal Demodulation Method

Liu¹,

Li²,

Liu³

2016

Proceedings of the 2016 International Conference on Computer Engineering and Information Systems

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Abstract-A Fabry-Perot fiber-optic accelerometer based on the principle that the acceleration can be sensed through changing the length of the Fabry-Perot cavity by an inertial mass is designed and the Fizeau interferometer based demodulation principle and system for the designed Fabry-Perot fiber-optic accelerometer are proposed. Aiming at the Fizeau interferometer based demodulation principle and system for the designed Fabry-Perot fiber-optic accelerometer, the relative light intensity output from the Fizeau interferometer as a function of the length of the Fabry-Perot cavity and the wedge thickness of the Fizeau interferometer is established. In addition, the theoretical acceleration demodulation model for the Fabry-Perot fiber-optic accelerometer based on a Fizeau interferometer is also established. On these bases, the principle that the acceleration from the Fabry-Perot fiber-optic accelerometer can be demodulated based on the Fizeau interferometer is numerically simulated. The research results indicates the consistency of the simulated results with the theoretical analysis and the feasibility of the acceleration demodulation of the Fabry-Perot fiber-optic accelerometer based on the Fizeau interferometer.

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“…I NTERFEROMETRIC optical fiber accelerometer has been widely used in the fields, such as target discrimination [1], oil well logging [2], [3], and permanent reservoir monitoring [4]- [6], due to their high sensitivity, wide dynamic range, and immunity to EMI, compared to conventional electrical accelerometer. Cross responsivity is an important parameter of such accelerometer, because it directly affects the sensor's vector performance, which is significant in the precise location [7], anisotropic signal processing [8], and seismic imaging [9] especially for multidimensions' measurement in the fields of seismic monitoring.…”

Section: Introductionmentioning

confidence: 99%

All-Metal Optical Fiber Accelerometer With Low Transverse Sensitivity for Seismic Monitoring

Jiang

Zhang

2013

IEEE Sensors J.

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An all-metal double metal diaphragm-based optical fiber accelerometer with low transverse sensitivity is proposed and experimentally demonstrated. The theoretical analysis is given based on the electro-mechanical theory. Finite element modal analysis shows that the proposed accelerometer has low transverse sensitivity. Calibration results show that axis responsivity is 41 dB (re: 0 dB = 1 rad/g) with a fluctuation ± 2 dB in frequency bandwidth of 5-400 Hz. The transverse sensitivity is ∼3 dB (re: 0 dB= 1 rad/g) with a fluctuation ± 1.5 dB. A transverse sensitivity of about −40 dB is achieved. The fluctuation of the acceleration responsivity for the three accelerometers is within ± 2.5 dB, which shows good consistency of the proposed accelerometer. The minimum phase demodulation detection accuracy of the phase-generated carrier is 10 −5 rad/Hz 1/2 , and the minimum detectable acceleration can be 90 ng/Hz 1/2 theoretically. With an all-metal structure, the proposed accelerometer is expected to improve the reliability of long-term use in harsh environment. These desirable features show that the proposed optical fiber accelerometer is promising for seismic wave monitoring in oil and gas exploration.

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A 3-component fiber-optic accelerometer for well logging

Cited by 58 publications

References 16 publications

Compact dual-frequency fiber laser accelerometer with sub-μg resolution

Compact dual-frequency fiber laser accelerometer with sub-μg resolution

Study on a Single-axis Fabry-perot Fiber-optic Accelerometer and its Signal Demodulation Method

All-Metal Optical Fiber Accelerometer With Low Transverse Sensitivity for Seismic Monitoring

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