Study on fiber-optic low-coherence interferometric and fiber Bragg grating sensors

Rao, Yunjiang

doi:10.1007/s13320-011-0042-3

Cited by 24 publications

(12 citation statements)

References 56 publications

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“…O NE of the most interesting topics of the optical fiber sensing is the miniaturization of sensor structures [1], among which the extrinsic Fabry-Pérot interferometry is probably one of the most effective optical solutions [2]- [4], since it is a smart configuration for measuring various parameters [5]- [7]. Additionally, the development of micromachining technology brings a light path to address the problems brought by the procedure Manuscript of sensor miniaturization [8], [9].…”

Section: Introductionmentioning

confidence: 99%

Extrinsic Fabry–Pérot Underwater Acoustic Sensor Based on Micromachined Center-Embossed Diaphragm

Wang

Shao

Xie

et al. 2014

J. Lightwave Technol.

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Most research works emphasized on the acoustic sensor miniaturization are not optimized for applications under high surrounding pressure. For underwater acoustic sensing, measuring the small acoustic pressure from the huge hydrostatic pressure makes the design of the sensor challenging. In this paper, we attempt to solve the problem by adopting a center-embossed diaphragm as the sensitive structure. The deformation angular error is defined to evaluate the optical performance degradation and the optical sensitivity reduction under hydrostatic pressure. Simulations indicate that the central embossment is beneficial to maintain optics-related properties, although the structural sensitivity is reduced. Then, the diaphragm design guideline for underwater acoustic sensing is regulated. An optical fiber extrinsic Fabry-Pérot interferometer probe based on the diaphragm, which was micromachined by double-side etching of the silicon on insulator, was designed and assembled. Experimental results show that the interferometric fringe preserves similar shapes at any tested depth from 0 (in air) to 50 cm. The recovered signal detected by the sensor coincides well with the corresponding transmitted signal. The pressure sensitivity response is flat in frequency range from 10 to 2 kHz, of which value is about −154.6 dB re. 1/μPa. It agrees well with the theoretical predication. These results demonstrated that the designed sensor according to the guideline can be used as an underwater acoustic sensor. Moreover, the sensor has potential applications in smart unmanned platforms and swiftly deployable arrays.

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Section: Introductionmentioning

confidence: 99%

Extrinsic Fabry–Pérot Underwater Acoustic Sensor Based on Micromachined Center-Embossed Diaphragm

Wang

Shao

Xie

et al. 2014

J. Lightwave Technol.

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“…For example, surface plasma resonance (SPR) refractive index (RI) sensors [2], [3], grating-based RI sensors [4], [5], and interferometric RI sensors [6] should be temperature compensated for high accuracy RI measurement due to their own temperature sensitivity. Another example is strain measurement.…”

Section: Introductionmentioning

confidence: 99%

Laser-Machined Cascaded Micro Cavities for Simultaneous Measurement of Dual Parameters Under High Temperature

Ran

Zuo

et al. 2013

IEEE Sensors J.

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Fiber-optic cascaded micro Fabry-Perot (F-P) cavities fabricated by 157-nm laser micromachining is demonstrated for simultaneous measurement of high temperature and refractive index, or high temperature and strain, respectively. The sensor head consists of a short air extrinsic F-P cavity and an intrinsic single-mode fiber F-P cavity. These two micro cavities possess different response coefficients to temperature, strain, and refractive index, which are utilized for dual parameters measurement. Experimental results show that dual parameters measurement could have been achieved from 50°C to 380°C based on such a sensing structure.Index Terms-High temperature, laser micromachining, micro cavity, simultaneous measurement.

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“…Various interferometric techniques to measure the vibration and displacement of a surface have been reported. These techniques are based on holographic interferometry [1], speckle interferometry [2], shadow Moiré method [3], and classical interferometry [4][5][6][7][8][9][10][11][12][13]. The basic principle in most of these techniques is same, that is two coherent beams from a single source are interfered to form interference fringes.…”

Section: Introductionmentioning

confidence: 99%

Analog processing based vibration measurement technique using michelson interferometer

et al. 2012

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A Michelson interferometer based sensor, to monitor the displacement and vibration of a surface, is presented. The interference signals detected in quadrature are processed using analog electronics to find the direction of the motion of a vibrating surface in real-time. The complete instrumentation and signal processing are implemented for the interpretation of the amplitude as well as positive and negative excursion of the vibration cycles. This new technique is simpler as compared to the techniques commonly used in the interferometer based vibration sensors. Using this technique, we have measured mechanical vibrations having a magnitude of the order of nanometers and frequency in the range of 50 Hz to 500 Hz. By making small changes in the electronic circuit, the technique can be implemented for the extended range of the vibration frequencies and amplitude.

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Study on fiber-optic low-coherence interferometric and fiber Bragg grating sensors

Cited by 24 publications

References 56 publications

Extrinsic Fabry–Pérot Underwater Acoustic Sensor Based on Micromachined Center-Embossed Diaphragm

Extrinsic Fabry–Pérot Underwater Acoustic Sensor Based on Micromachined Center-Embossed Diaphragm

Laser-Machined Cascaded Micro Cavities for Simultaneous Measurement of Dual Parameters Under High Temperature

Analog processing based vibration measurement technique using michelson interferometer

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