Fiber Bragg grating based accelerometer

Au, Ho Yin; Khijwania, Sunil K.; Tam, Hwa Yaw

doi:10.1117/12.785992

Cited by 21 publications

(15 citation statements)

References 9 publications

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“…A number of fiber Bragg grating (FBG) based accelerometers have been demonstrated [4]- [8]. However, they suffer from low signal to noise ratio and resolution due to their passive nature.…”

Section: Introductionmentioning

confidence: 99%

A High-Frequency Accelerometer Based on Distributed Bragg Reflector Fiber Laser

Lai

et al. 2014

IEEE Photon. Technol. Lett.

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We propose an optical accelerometer based on distributed Bragg reflector (DBR) fiber laser sensor. The transducer's vibration reduces the birefringence of the preloaded fiber laser and consequently changes the beat frequency of the two orthogonally polarized lasing modes, thus the frequency can be used to retrieve the acceleration information. The DBR probe is a segment of bare erbium fiber, which has a very high natural frequency of vibration. Experimental results show that sensitivity of 4.810 MHz/g with a dynamic range of 0.01g-5g (where g = 9.8 m/s 2 is the gravity of the earth) and natural frequency of ∼1.3 kHz can be obtained with this sensing system.

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“…A number of fiber Bragg grating (FBG) based accelerometers have been demonstrated [4]- [8]. However, they suffer from low signal to noise ratio and resolution due to their passive nature.…”

Section: Introductionmentioning

confidence: 99%

A High-Frequency Accelerometer Based on Distributed Bragg Reflector Fiber Laser

Lai

et al. 2014

IEEE Photon. Technol. Lett.

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“…10,11) There are several methods for measuring acceleration using optical fibers. For example, there are methods using the Fabry-Perot interferometer, 12,13) amplitude modulators, 14) and differential optical detectors; 15) others measure the vibration of a micromachine silicon cantilever with light-density modulation using multimode fibers, 16) involve fiber Bragg gratings (FBGs), 10,11,[17][18][19][20][21][22][23] or are interferometric methods. [24][25][26][27] Among these, FBG 10,11,21) and interferometric 25) methods are primarily used for actualizing frequencies of 0.1 to several hundreds of Hz, which are necessary in earthquake observations including geophysical exploration, with a dynamic range of 100 dB.…”

Section: Introductionmentioning

confidence: 99%

Real-time displacement measurement system using phase-shifted optical pulse interferometry: Application to a seismic observation system

Yoshida¹,

Hirayama²,

Takahara³

et al. 2016

Jpn. J. Appl. Phys.

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We developed a method of detecting incident light levels on the oscillator surfaces and light pulses that include two interfering pulses with a phase shift of π/2 (phase-shifted optical pulse interferometry). This system enables the measurement of displacements greatly exceeding the half wavelength of the laser. Moreover, it allows measurements at multiple locations with a single optical fiber for using optical pulses. In this study, we conducted an interference experiment using 30 ns optical pulses and transmitted them at 1 µs intervals. We confirmed that the above two measurements are possible. Furthermore, from the data of the oscillator used for verification, we showed that measurements on the order of nanometers are possible. Since this method does not require a power supply to the oscillator, its widespread applications in physical exploration can be expected.

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“…Usually accelerometers are classified based on the form of transduction mechanism which are capacitive piezoelectric, piezoresistive, thermal, electron tunnelling and Bragg grating methods. The capacitive form is one of most widely techniques which is fully compatible with MEMS-based technologies [4][5][6][7][8]. It is because of their high sensitivity, good dc response and noise performance, low drift, low temperature sensitivity, low power dissipation and simple structure [9,10].…”

Section: Introductionmentioning

confidence: 99%

Low frequency interdigital capacitive sensor using deep reactive ion etching and bulk micromachining of silicon

Mehran

Mohajerzade

2010

2010 18th Iranian Conference on Electrical Engineering

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A novel fabrication procedure for implementation of suspended, interdigital capacitive sensor on silicon-based membranes is reported. The process employs a combination of anisotropic back-side micromachining with front-side vertical deep reactive ion etching of silicon. The formation of cavities underneath the interdigital structure beside the evolution of nano-grass on the back side of the sample, allows inclusion of liquid to add to the effective mass of the device and to realize a low frequency sensing device suitable for earthquake prediction. The etching of vertical pieces is feasible using a hydrogen-assisted reactive ion etching. Also the evolution of grass on the back and front sides of the sample can be controlled by etching parameters.

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Fiber Bragg grating based accelerometer

Cited by 21 publications

References 9 publications

A High-Frequency Accelerometer Based on Distributed Bragg Reflector Fiber Laser

A High-Frequency Accelerometer Based on Distributed Bragg Reflector Fiber Laser

Real-time displacement measurement system using phase-shifted optical pulse interferometry: Application to a seismic observation system

Low frequency interdigital capacitive sensor using deep reactive ion etching and bulk micromachining of silicon

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