Realization of fiber optic displacement sensors

Guzowski, B.; Lakomski, Mateusz

doi:10.1016/j.yofte.2017.12.018

Cited by 18 publications

(8 citation statements)

References 21 publications

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“…When the light propagates in the transmitting fiber, the radial distribution along the fiber axis can achieve an approximately Gaussian distribution. The irradiance of emitted light from the transmitting fiber obeys an exponential law according to [32][33][34]: Compared with the standard fiber, the fiber with microsphere structure has a higher numerical aperture (NA) [35]. The relationship between the NA of the optical fiber and the light intensity is simulated using the MATLAB software, as shown in Figure 2.…”

Section: Configuration and Operating Principlementioning

confidence: 99%

MEMS-Based Reflective Intensity-Modulated Fiber-Optic Sensor for Pressure Measurements

Zhou

Jia

Liu

et al. 2020

Sensors

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A reflective intensity-modulated fiber-optic sensor based on microelectromechanical systems (MEMS) for pressure measurements is proposed and experimentally demonstrated. The sensor consists of two multimode optical fibers with a spherical end, a quartz tube with dual holes, a silicon sensitive diaphragm, and a high borosilicate glass substrate (HBGS). The integrated sensor has a high sensitivity due to the MEMS technique and the spherical end of the fiber. The results show that the sensor achieves a pressure sensitivity of approximately 0.139 mV/kPa. The temperature coefficient of the proposed sensor is about 0.87 mV/°C over the range of 20 °C to 150 °C. Furthermore, due to the intensity mechanism, the sensor has a relatively simple demodulation system and can respond to high-frequency pressure in real time. The dynamic response of the sensor was verified in a 1 kHz sinusoidal pressure environment at room temperature.

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Section: Configuration and Operating Principlementioning

confidence: 99%

MEMS-Based Reflective Intensity-Modulated Fiber-Optic Sensor for Pressure Measurements

Zhou

Jia

Liu

et al. 2020

Sensors

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“…Optical sensors based on bers are the ones used in this study, because of several advantages, such as small size, hard environment tolerance, impact of electromagnetic elds, exibility and the structural simplicity [6,7].…”

Section: Introductionmentioning

confidence: 99%

High precision machining of a displacement sensor for helicoidal motions

Elrawashdeh¹,

Revel²,

Prelle³

et al. 2021

Preprint

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This research study presents the design and the high precision manufacture procedure of a fiber-optic displacement sensor. It is composed of two fiber-optic probes associated with a structure of a cones’ grating. The sensor is characterized by its ability to measure the linear displacement for an axis performing a helicoidal motion. This motion has been demonstrated on a high precision lathe; where the spindle provided the rotational motion, associated to a translational motion on the linear stage. This allowed to obtain the two simultaneous motions. The displacement of the translational stage is measured by the sensor in real time.Firstly, a highly precise geometric model of the reflector part for the sensor was developed. This model provided a specific geometry for the cones-assembled grating, which has been precisely manufactured. The geometric parameters and the surface characteristics of each step in the fabricated grating were both identified in situ on the lathe. The agreement between simulation and experimental results is excellent. The performances of the fiber-optic displacement sensor were identified in-situ on the lathe. The analysis of the voltage output signals from the two fiber-optic probes is used to measure the grating displacement. The unbalanced rotation due to non-centered axes was also characterized. The sensor provided a micrometric resolution, on a measurement range of more than one centimeter.

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“…However, most of the optical fiber displacement sensors currently focus on millimeter and micrometer scales, 14,15 and there are relatively few studies on nano‐displacement sensing. In the research of nano‐displacement sensing, there are also problems such as complex preparation process, high operation difficulty, and high cost 16–19 . For example, Dash et al 18 have presented a stable nano‐displacement sensor based on large mode area photonic crystal fiber modal interferometer, which shows sensitivity of 32 pm/nm.…”

Section: Introductionmentioning

confidence: 99%

“…In the research of nano-displacement sensing, there are also problems such as complex preparation process, high operation difficulty, and high cost. [16][17][18][19] For example, Dash et al 18 have presented a stable nano-displacement sensor based on large mode area photonic crystal fiber modal interferometer, which shows sensitivity of 32 pm/nm. Although the proposed displacement sensor has high stability, the preparation method is more complicated and the sensitivity is relatively low.…”

Section: Introductionmentioning

confidence: 99%

High‐finesse nanoscale displacement sensor based on fiber optic polymer probe

Zhang

Lin

Zhao

2021

Micro & Optical Tech Letters

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As an important branch in the field of precision measurement, optical fiber micro-displacement measurement plays an increasingly important role in the fields of precision machining, bioengineering, and so forth. In this paper, an optical fiber probe with high coupling efficiency is prepared based on photopolymerization, and on the basis of this structure, a new type of nanoscale displacement sensor is designed and implemented. The sensitivity and linear fitting coefficient of the designed sensor are 0.00289 dBm/nm and 98.8% in the range of 0-1000 nm, respectively. The proposed sensor is highly stable and persistent, has the advantages of high sensitivity, simple structure, low cost of production, and easy operation, which has major advantages in the application of precision displacement sensing field.

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Realization of fiber optic displacement sensors

Cited by 18 publications

References 21 publications

MEMS-Based Reflective Intensity-Modulated Fiber-Optic Sensor for Pressure Measurements

MEMS-Based Reflective Intensity-Modulated Fiber-Optic Sensor for Pressure Measurements

High precision machining of a displacement sensor for helicoidal motions

High‐finesse nanoscale displacement sensor based on fiber optic polymer probe

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